C11111333133313232233133313331333131133132233133313113313221111   >>    C1111133313331323223313331333133313113313223313331311331322111   <<    C11111333133313232233133313331333131133132233133313113313221113   >>      C11111333133313232233133313331333131133132233133313113313221112   >>