C111123313331323113313331333133313331122112312111133132233132321121   >>    C11112331333132311331333133313331333112211231211113313223313232112   <<    C111123313331323113313331333133313331122112312111133132233132321123   >>      C111123313331323113313331333133313331122112312111133132233132321122   >>