C11111333133313232233133313331333133313331311233133313113121221   >>    C1111133313331323223313331333133313331333131123313331311312122   <<    C11111333133313232233133313331333133313331311233133313113121223   >>      C11111333133313232233133313331333133313331311233133313113121222   >>