C111123313331323113313331333133313331122112312111133133313331333131232212121   >>    C11112331333132311331333133313331333112211231211113313331333133313123221212   <<    C111123313331323113313331333133313331122112312111133133313331333131232212123   >>      C111123313331323113313331333133313331122112312111133133313331333131232212122   >>