C111123313331323113313331333133313331323131211113313331311331323222232121121111   >>    C11112331333132311331333133313331333132313121111331333131133132322223212112111   <<    C111123313331323113313331333133313331323131211113313331311331323222232121121113   >>      C111123313331323113313331333133313331323131211113313331311331323222232121121112   >>