C11111333133313232233133313331333131133132313331312111113212131   >>    C1111133313331323223313331333133313113313231333131211111321213   <<    C11111333133313232233133313331333131133132313331312111113212133   >>      C11111333133313232233133313331333131133132313331312111113212132   >>