a a a a a a a a a
a a a a a a a a a
a a a a a a a a a
a a a a a a a a

##</code><code>##

       a
      a a
     a a a
    a a a a
   a a a a a
  a a a a a a
 a a a a a a a
 a a a a a a a

##</code><code>##

          The
         same
       principle
      applies to
    any text file,
  basically splitting
 words only on spaces
     or new lines

##</code><code>##

/[ 
]+/

##</code><code>##

open F,"ctriangle.txt";sub n{print
" "x(40-$r/2)."$x\n"};for(split/[ 
]+/,join'',<F>){$c=$r,n,$x=''if(
$r=length($x.=" $_"))>$c}n

##</code><code>##

open F,"ctriangle.txt";sub n{print
" "x(40-$r/2)."$x\n"};$/=$w;$_=<F>;
for(split){$c=$r,n,$x=''if(
$r=length($x.=" $_"))>$c}n