C11111333133313232233133313331333133313231322321111331311312111   >>    C1111133313331323223313331333133313331323132232111133131131211   <<    C11111333133313232233133313331333133313231322321111331311312113   >>      C11111333133313232233133313331333133313231322321111331311312112   >>