A sign with the lettering "Attention children!" is seen during a handover of the new electric car, the ID.3 by the German automaker Volkswagen to a customer at the "Autostadt" in Wolfsburg, Germany, September 11, 2020. REUTERS/Annegret Hilse

A German flag flutters in front of the Reichstag building in Berlin, Germany, September 6, 2020. Letters read "To the German people". Picture taken September 6, 2020. REUTERS/Joachim Herrmann

A German flag flutters in front of the Reichstag building in Berlin, Germany, September 6, 2020. Letters read "To the German people". Picture taken September 6, 2020. REUTERS/Joachim Herrmann

Soccer Football - Lionel Messi's FC Barcelona transfer request - Barcelona, Spain - September 4, 2020 A journalist displays a letter on a mobile phone from Lionel Messi's father and agent Jorge Messi to La Liga President Javier Tebas, outside Messi's home REUTERS/Nacho Doce

Soccer Football - Lionel Messi's FC Barcelona transfer request - Barcelona, Spain - September 4, 2020 Journalists read a letter from Lionel Messi's father and agent Jorge Messi to La Liga President Javier Tebas, outside Messi's home REUTERS/Nacho Doce

Rainwater bleeds the lettering on a protest sign at Black Lives Matter Plaza in Washington, U.S. September 1, 2020. REUTERS/Jonathan Ernst

A person holds balloons during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People seen in silhouettes do the three-fingers salute during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People attend an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People do the three-fingers salute while holding balloons during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

A person poses with a balloon with pictures attached to it during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People hold balloons and a banner during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People pose with balloons and a banner during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

A man holds balloons with anti-government notes attached to them during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

A person holds balloons with anti-government notes attached to them during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People pose with a drawing depicting Thailand's Prime Minister Prayut Chan-o-cha and balloons during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

A man poses with a drawing depicting Thailand's Prime Minister Prayut Chan-o-cha and balloons during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People pose with a drawing depicting Thailand's Prime Minister Prayut Chan-o-cha and balloons during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

People attach anti-government notes on balloons during an event to write a letter to the sky calling for tax return, created by a pro-democracy group called Dictatorship Demolition Organization (DDO), after the government decided to purchase controversial submarines worth 22.5 billion from China, in Bangkok, Thailand August 31, 2020. REUTERS/Jorge Silva

Kim Jee-hyun, second-year med school student and president of SNU College of Medicine student council, and Hong Min-jung, second-year vice president of SNU medical school student council, gather to hand in leave of absence letter to strike against the government's medical policies including boosting medical school admissions, in Seoul, South Korea, August 26, 2020. REUTERS/Daewoung Kim

Kim Jee-hyun, second-year med school student and president of SNU College of Medicine student council talks with his colleagues as they gather to hand in leave of absence letter to strike against the government's medical policies including boosting medical school admissions, in Seoul, South Korea, August 26, 2020. REUTERS/Daewoung Kim

Pro-democracy student leader Panusaya Sithijirawattanakul speaks after handing in a letter with demands to reform the monarchy to members of the parliament, in Bangkok, Thailand, August 26, 2020. REUTERS/Athit Perawongmetha

Pro-democracy student leader Panusaya Sithijirawattanakul, hands in a letter, with demands to reform the monarchy, to members of the parliament, in Bangkok, Thailand, August 26, 2020. REUTERS/Athit Perawongmetha

A man puts letters in to a mail box while demonstrating in support of the U.S. Postal Service (USPS) outside a post office in Cambridge, Massachusetts, U.S., August 25, 2020. REUTERS/Brian Snyder

A man carries letters into a United States Postal Service (USPS) post office in the Brooklyn borough of New York City, U.S., August 21, 2020. REUTERS/Brendan McDermid

A man carries letters into a United States Postal Service (USPS) post office in the Brooklyn borough of New York City, U.S., August 21, 2020. REUTERS/Brendan McDermid

An individual deposits letters into a U.S. Postal Service (USPS) collection mailbox in Philadelphia, Pennsylvania, U.S., August 14, 2020. REUTERS/Rachel Wisniewski

An individual deposits letters into a U.S. Postal Service (USPS) collection mailbox in Philadelphia, Pennsylvania, U.S., August 14, 2020. REUTERS/Rachel Wisniewski

An individual deposits letters into a U.S. Postal Service (USPS) collection mailbox in Philadelphia, Pennsylvania, U.S., August 14, 2020. REUTERS/Rachel Wisniewski

An individual deposits letters into a U.S. Postal Service (USPS) collection mailbox in Philadelphia, Pennsylvania, U.S., August 14, 2020. REUTERS/Rachel Wisniewski

An individual deposits letters into a U.S. Postal Service (USPS) collection mailbox in Philadelphia, Pennsylvania, U.S., August 14, 2020. REUTERS/Rachel Wisniewski

Workers install the letters for the new name of the football stadium, named after Germany's largest business bank, Deutsche Bank, in Frankfurt, Germany, August 11, 2020. REUTERS/Kai Pfaffenbach

Workers install the letters for the new name of the football stadium, named after Germany's largest business bank, Deutsche Bank, in Frankfurt, Germany, August 11, 2020. REUTERS/Kai Pfaffenbach

Workers install the letters for the new name of the football stadium, named after Germany's largest business bank, Deutsche Bank, in Frankfurt, Germany, August 11, 2020. REUTERS/Kai Pfaffenbach

A man walks past Tanabata festival decorations, made with a bamboo branch and strips of coloured paper, which have letters saying 'stop Coronavirus', amid the coronavirus disease (COVID-19) pandemic at Shibuya district in Tokyo, Japan August 3, 2020. REUTERS/Kim Kyung-Hoon

The shadows of a letter 'C' and the granddaughter of 92-year-old Jose, who passed away from complications related to the coronavirus disease (COVID-19), are reflected in a glass while she uses a mobile phone, at the hospital where Jose died in Santiago, Chile July 1, 2020. Picture taken with the camera turned up side down. Picture taken July 1, 2020. REUTERS/Ivan Alvarado TPX IMAGES OF THE DAY

Union groups submit petition letters to British Consulate General to express their determination of opposing the new national security law, in Hong Kong, China June 26, 2020. REUTERS/Tyrone Siu

Union groups submit petition letters to British Consulate General to express their determination of opposing the new national security law, in Hong Kong, China June 26, 2020. REUTERS/Tyrone Siu

The letter M of a sign from a McDonald's restaurant on 42nd Street in Times Square in Manhattan is seen on a flatbed truck after it permanently closed following the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 24, 2020. REUTERS/Mike Segar

A worker unloads removed letters from a sign at a McDonald's restaurant on 42nd Street in Times Square in Manhattan after it permanently closed following the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., June 24, 2020. REUTERS/Mike Segar

Thamara Goncalves de Assis delivers letters written by children from her family to a nurse as she asks her to read to her mother Rosimeire who is suffering from the coronavirus disease (COVID-19) at the Intensive Care Unit (ICU) of Emilio Ribas Institute in Sao Paulo, Brazil, June 17, 2020. REUTERS/Amanda Perobelli

Artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Pedestrians walk the streets while artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Pedestrians walk the streets while artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson

Artists fill in the letters of a "Black Lives Matter" mural on E. Pine Street as protesters establish what they call an autonomous zone while protesting against racial inequality and calling for the defunding of Seattle police, near the department's East Precinct in this aerial photo taken over Seattle, Washington, U.S. June 11, 2020. REUTERS/Lindsey Wasson TPX IMAGES OF THE DAY

A demonstrator with letters "BLM" written on her forehead attends a protest at the Place de la Republique square, following the death of George Floyd in Minneapolis police custody, in Paris, France June 9, 2020. REUTERS/Christian Hartmann

A demonstrator with letters "BLM" written on her forehead attends a protest at the Place de la Republique square, following the death of George Floyd in Minneapolis police custody, in Paris, France June 9, 2020. REUTERS/Christian Hartmann

A demonstrator waves an upside-down American flag defaced with the letters "BLM" at the "Black Lives Matter Plaza", near the White House, during a protest against racial inequality in the aftermath of the death in Minneapolis police custody of George Floyd, in Washington, U.S. June 6, 2020. REUTERS/Jim Bourg

A demonstrator waves an upside-down American flag defaced with the letters "BLM" at the "Black Lives Matter Plaza", near the White House, during a protest against racial inequality in the aftermath of the death in Minneapolis police custody of George Floyd, in Washington, U.S. June 6, 2020. REUTERS/Jim Bourg

A demonstrator waves an upside-down American flag defaced with the letters "BLM" at the "Black Lives Matter Plaza", near the White House, during a protest against racial inequality in the aftermath of the death in Minneapolis police custody of George Floyd, in Washington, U.S. June 6, 2020. REUTERS/Jim Bourg

A demonstrator waves an upside-down American flag defaced with the letters "BLM" at the "Black Lives Matter Plaza", near the White House, during a protest against racial inequality in the aftermath of the death in Minneapolis police custody of George Floyd, in Washington, U.S. June 6, 2020. REUTERS/Jim Bourg

A demonstrator waves an upside-down American flag defaced with the letters "BLM" at the "Black Lives Matter Plaza", near the White House, during a protest against racial inequality in the aftermath of the death in Minneapolis police custody of George Floyd, in Washington, U.S. June 6, 2020. REUTERS/Jim Bourg

The letters "BLM" are seen on a bus stop window in front of a mural of George Floyd and a man walking by holding a banner during a "Black Lives Matter" protest following the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 3, 2020. REUTERS/Dylan Martinez

The letters "BLM" are seen on a bus stop window in front of a mural of George Floyd during a "Black Lives Matter" protest following the death of George Floyd who died in police custody in Minneapolis, London, Britain, June 3, 2020. REUTERS/Dylan Martinez

A protester jumps across letters of the CNN logo in front of the CNN Center during a protest against the death in Minneapolis police custody of African-American man George Floyd, in Atlanta, Georgia, U.S. May 29, 2020. REUTERS/Dustin Chambers