C111123313331323113313331333133313121111133112121111331323112112121   >>    C11112331333132311331333133313331312111113311212111133132311211212   <<    C111123313331323113313331333133313121111133112121111331323112112123   >>      C111123313331323113313331333133313121111133112121111331323112112122   >>