C111123313331323113313331333133313331122112312111133133313331333133311211313121   >>    C11112331333132311331333133313331333112211231211113313331333133313331121131312   <<    C111123313331323113313331333133313331122112312111133133313331333133311211313123   >>      C111123313331323113313331333133313331122112312111133133313331333133311211313122   >>