C11111333133313232233133313331333133313221333133313232212111111211312131   >>    C1111133313331323223313331333133313331322133313331323221211111121131213   <<    C11111333133313232233133313331333133313221333133313232212111111211312133   >>      C11111333133313232233133313331333133313221333133313232212111111211312132   >>