猜谜语(英语）

猜谜语(英语）
I have five letters.My first letter is in CAT,but not in CAP.Mysecond letter is in SIT,but not in SAT.My third letter is in BAG,but not in BAT.My fourth letter is in TOE,but not in TOY.My last letter is in HER,but not in HEN.What am
谜底是：-----------