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Bulgarians wearing masks participate in the annual "Ziua Cucilor" spring festival in Branesti, near Bucharest, capital of Romania, on Feb. 19, 2018. (Xinhua/Cristian Cristel)

Bulgarians wearing masks participate in the annual "Ziua Cucilor" spring festival in Branesti, near Bucharest, capital of Romania, on Feb. 19, 2018. (Xinhua/Cristian Cristel)