C11111333133313232233133313331333133112111112113313331311221123221211   >>    C1111133313331323223313331333133313311211111211331333131122112322121   <<    C11111333133313232233133313331333133112111112113313331311221123221213   >>      C11111333133313232233133313331333133112111112113313331311221123221212   >>