text: aky yak-service yak-service russia yak yakolev yak avia russia yak design bureau yl llm yamal airlines yamal russia cyg yana airlines vicair cambodia y8 yzr yangtze river express yangtze river china elw yellow wings air services yellow wings kenya iy iye yemenia yemeni yemen erv yerevan-avia yerevan-avia armenia yfs young flying service young air united states ayu yuhi air lines japan ugn yuzhnaya aircompany pluton kazakhstan 2n umk yuzhmashavia yuzmash ukraine