C11111333133313232233133313331333131133132313311211111333121211   >>    C1111133313331323223313331333133313113313231331121111133312121   <<    C11111333133313232233133313331333131133132313311211111333121213   >>      C11111333133313232233133313331333131133132313311211111333121212   >>