C11111333133313232233133313331333133313331312111133133311221123231211   >>    C1111133313331323223313331333133313331333131211113313331122112323121   <<    C11111333133313232233133313331333133313331312111133133311221123231213   >>      C11111333133313232233133313331333133313331312111133133311221123231212   >>