C111123313331323113313331333133313331122112312111133133323311331   >>    C11112331333132311331333133313331333112211231211113313332331133   <<    C111123313331323113313331333133313331122112312111133133323311333   >>      C111123313331323113313331333133313331122112312111133133323311332   >>