C11111333133313232233133313331333133112111112113313112133313211   >>    C1111133313331323223313331333133313311211111211331311213331321   <<    C11111333133313232233133313331333133112111112113313112133313213   >>      C11111333133313232233133313331333133112111112113313112133313212   >>