[R] simplify this instruction

[CE.KA]

Hi R users,

Is there a way to simplify this instruction:
ifelse(B=="0","A",
ifelse(B=="1","A",
ifelse(B=="2","A",
ifelse(B=="3","A",
ifelse(B=="4","A",
ifelse(B=="5","A",
ifelse(B=="6","A",
ifelse(B=="7","A",
ifelse(B=="8","A",
ifelse(B=="9","A","B"))))))))))

i am looking for something like this:

ifelse(B=="(0:9)","A","B")

Best regards
-- 
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