C111123313331323113313331333133313231323221212111133132213123121   >>    C11112331333132311331333133313331323132322121211113313221312312   <<    C111123313331323113313331333133313231323221212111133132213123123   >>      C111123313331323113313331333133313231323221212111133132213123122   >>