C11111333133313232233133313331333131133131211111133131122112312131   >>    C1111133313331323223313331333133313113313121111113313112211231213   <<    C11111333133313232233133313331333131133131211111133131122112312133   >>      C11111333133313232233133313331333131133131211111133131122112312132   >>