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After pondering my improved Python algorithm for a while, I was surprised to shave two further strokes from my previous best legitimate Perl solution with this 56 stroker:

```\$\+=(\$n="1E@-"%9995)-\$\%\$n*2while\$/=\1,IXCMVLD=~<>;print
Notice that this solution is a strange hybrid of regex and magic formula -- and so perhaps proves both Mtv's law of golf ("regexes always win") and eyepopslikeamosquito's law ("magic formulae always win"). :) Also unusual is that while trumps for on this occasion. The complete list of new Perl solutions I've found since my original post are:
```\$\+=(\$n="1E@-"%9995)-\$\%\$n*2while\$/=\1,IXCMVLD=~<>;print
\$\+=\$n-2*\$n%(\$n="1E@-"%9995)while\$/=\1,IXCMVLD=~<>;print
\$\+=\$n-2*\$\%(\$n="1E@-"%9995)while\$/=\1,IXCMVLD=~<>;print
\$\+=(\$n=IXCMVLD=~\$_*"1E@-"%9995)-\$\%\$n*2for<>=~/./g;print
\$\+=\$'-\$\%\$'*2while\$/=\1,I1V5X10L50C100D500M1e3=~<>;print
\$\+=I1V5X10L50C100D500M1e3=~\$_*\$'-\$\%\$'*2for<>=~/./g;print
\$\+=(\$n=(IXCMVLD=~\$_."E@-")%9995)-\$\%\$n*2for<>=~/./g;print
\$\+=(\$n=VLD=~\$_*5+IXCM=~\$_."E@-")-\$\%\$n*2for<>=~/./g;print
\$\+=M999D499C99L49X9V4I=~\$_+\$'-2*\$\%(\$'+1)for<>=~/./g;print
\$\+=(\$n=10**index(IXCMVLD,\$_)%9995)-\$\%\$n*2for<>=~/./g;print
\$\+=s//IXCMVLD=~\$&."E@-%9995"/ee*\$_-\$\%\$_*2for<>=~/./g;print
D6L5V4M3C2X1=~\$_,\$\+=(\$n="1E\$'"%9995)-\$\%\$n*2for<>=~/./g;print
\$\+=\$n-2*\$n%(\$n=uppp&7**(9671487%ord()/15)x1)for<>=~/./g;print
# update: some more after finding getc
\$\+=(\$n=1+substr'004999',"@-",3)-\$\%\$n*2while VLDMCXI=~getc;print
\$\+=\$'-\$\%\$'*2while I1V5X10L50C100D500M1e3=~getc;print
\$\+=(\$n="1E@-"%9995)-\$\%\$n*2while IXCMVLD=~getc;print

Update: An improved 74 stroke symref-based solution, after "finding" getc (see below):

```\$b=++\$I;\$\$_=\$b*=\$^F^=7for V,X,L,C,D,M;
\$\+=\$n-\$\%\$n*2while\$n=\${+getc};print
And here's a quirky 83-stroke PHP version:
```<?for(\$M=2*\$D=5*\$C=2*\$L=5*\$X=2*\$V=5*\$I=1;\$n=\${fgetc(STDIN)};\$t+=\$n-2*\$
+t%\$n)?><?=\$t;

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