C11111333133313232233133313331333131133132313311211111133132333113211111   >>    C1111133313331323223313331333133313113313231331121111113313233311321111   <<    C11111333133313232233133313331333131133132313311211111133132333113211113   >>      C11111333133313232233133313331333131133132313311211111133132333113211112   >>