Participants, who wear a Russian traditional hat Ushanka and a costume depicting a bear with the stringed musical instrument Balalaika, attend a rally held by Ukrainian nationalists near the Russian embassy in Kiev, Ukraine March 18, 2018. REUTERS/Valentyn Ogirenko 

A participant, wearing a Russian traditional hat Ushanka and holding the stringed musical instrument Balalaika, attends a rally held by Ukrainian nationalists near the Russian embassy in Kiev, Ukraine March 18, 2018. The placard reads "Russian world". REUTERS/Valentyn Ogirenko 

A participant, wearing a Russian traditional hat Ushanka and holding the stringed musical instrument Balalaika, attends a rally held by Ukrainian nationalists near the Russian embassy in Kiev, Ukraine March 18, 2018. REUTERS/Valentyn Ogirenko 

A participant of a festival of winter swimming plays balalaika after taking a dip into the ice water in the town of Podolsk, south of Moscow, Russia January 5, 2017. REUTERS/Maxim Shemetov 

A Russian communist supporter (L) plays the traditional Russian balalaika musical instrument while others sing during a rally to mark the anniversary of the 1917 Bolshevik revolution in Russia's far eastern city of Vladivostok, November 7, 2010. REUTERS/Yuri Maltsev (RUSSIA - Tags: ANNIVERSARY POLITICS) 

A baker demonstrates a cake made in the form of a traditional Russian balalaika musical instrument during a food fair in the Siberian city of Krasnoyarsk, March 24, 2010. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY FOOD)