C11111333133313232233133313331333131133132313331322121111121311331333132212121   >>    C1111133313331323223313331333133313113313231333132212111112131133133313221212   <<    C11111333133313232233133313331333131133132313331322121111121311331333132212123   >>      C11111333133313232233133313331333131133132313331322121111121311331333132212122   >>