C111123313331323113313331333133313121111133112121111331323211232313233121   >>    C11112331333132311331333133313331312111113311212111133132321123231323312   <<    C111123313331323113313331333133313121111133112121111331323211232313233123   >>      C111123313331323113313331333133313121111133112121111331323211232313233122   >>