C11111333133313232233133313331333133313331311331333133313133121121   >>    C1111133313331323223313331333133313331333131133133313331313312112   <<    C11111333133313232233133313331333133313331311331333133313133121123   >>      C11111333133313232233133313331333133313331311331333133313133121122   >>