C111123313331323113313331333133313331323131211113313331311331121231   >>    C11112331333132311331333133313331333132313121111331333131133112123   <<    C111123313331323113313331333133313331323131211113313331311331121233   >>      C111123313331323113313331333133313331323131211113313331311331121232   >>