C11111333133313232233133313331333133313331311331333132112323221   >>    C1111133313331323223313331333133313331333131133133313211232322   <<    C11111333133313232233133313331333133313331311331333132112323223   >>      C11111333133313232233133313331333133313331311331333132112323222   >>