$_=<>;for($i=0;$i<($L=length()-1)/2;$i++){print;unshift@prev,$_;if($i!=1){substr($_,$i,1)=" ";substr($_,-2-$i,1)=" "}}shift@prev if$L%2;print for@prev
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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