C11111333133313232233133313331333133313331311233133313113313331312111   >>    C1111133313331323223313331333133313331333131123313331311331333131211   <<    C11111333133313232233133313331333133313331311233133313113313331312113   >>      C11111333133313232233133313331333133313331311233133313113313331312112   >>