C111123313331323113313331333133313331122112312111133112331311331333123311   >>    C11112331333132311331333133313331333112211231211113311233131133133312331   <<    C111123313331323113313331333133313331122112312111133112331311331333123313   >>      C111123313331323113313331333133313331122112312111133112331311331333123312   >>