C11111333133313232233133313331333131133132233133313113313233123221   >>    C1111133313331323223313331333133313113313223313331311331323312322   <<    C11111333133313232233133313331333131133132233133313113313233123223   >>      C11111333133313232233133313331333131133132233133313113313233123222   >>