C11111333133313232233133313331333133313331311331333132112312121   >>    C1111133313331323223313331333133313331333131133133313211231212   <<    C11111333133313232233133313331333133313331311331333132112312123   >>      C11111333133313232233133313331333133313331311331333132112312122   >>