It's the first in 'snake' but not in 并回答

It's the first in 'snake' but not in 并回答
It's the first in 'snake' but not in 并回答

It's the first in 'snake' but not in 并回答
是猜个英文字母吧.
它是单词‘snake’中的第一个,但不是'mouse'中的第一个.
是'S' .
回答 it's 'S'