C111123313331323113313331333133313331323132333133313331311211311232121   >>    C11112331333132311331333133313331333132313233313331333131121131123212   <<    C111123313331323113313331333133313331323132333133313331311211311232123   >>      C111123313331323113313331333133313331323132333133313331311211311232122   >>