#!perl -lp040 $s=/m/ if/u/;($y=I1V5X10L50C100D500M1000IV4IX9XL40XC90CD400CM900)=~/$&/,$i=$t+=$s^"$;">($;=$')?-$;:$;while s/.$//}{1while$y=~/(\D+)$i/&&$t>=$i?($_.=$1,$t-=$i):$i--