Singular /plural
https://wordwall.net/ru/resource/31065111/english/%d0%b5%d0%b4%d0%b8%d0%bd%d1%81%d1%82%d0%b2%d0%b5%d0%bd%d0%bd%d0%be%d0%b5-%d0%b8-%d0%bc%d0%bd%d0%be%d0%b6%d0%b5%d1%81%d1%82%d0%b2%d0%b5%d0%bd%d0%bd%d0%be%d0%b5-%d1%87%d0%b8%d1%81%d0%bb%d0%be-%d1%81%d1%83%d1%89%d0%b5%d1%81%d1%82%d0%b2%d0%b8%d1%82%d0%b5%d0%bb%d1%8c%d0%bd%d1%8b%d1%85-%d0%b2