C111123313331323113313331333133313331122112312111133133313331333113233121   >>    C11112331333132311331333133313331333112211231211113313331333133311323312   <<    C111123313331323113313331333133313331122112312111133133313331333113233123   >>      C111123313331323113313331333133313331122112312111133133313331333113233122   >>