C111123313331323113313331333133313331122112312111133132233121121   >>    C11112331333132311331333133313331333112211231211113313223312112   <<    C111123313331323113313331333133313331122112312111133132233121123   >>      C111123313331323113313331333133313331122112312111133132233121122   >>