C111123313331323113313331333133313121111133112121111331311331323132213231322321   >>    C11112331333132311331333133313331312111113311212111133131133132313221323132232   <<    C111123313331323113313331333133313121111133112121111331311331323132213231322323   >>      C111123313331323113313331333133313121111133112121111331311331323132213231322322   >>