C11111333133313232233133313331333133313331311331333133313311213111   >>    C1111133313331323223313331333133313331333131133133313331331121311   <<    C11111333133313232233133313331333133313331311331333133313311213113   >>      C11111333133313232233133313331333133313331311331333133313311213112   >>