while (<TEST> and !$flag){}


##</code><code>##

1 while defined ($_ = <>) and not $seen = /test/;
say $seen;


##</code><code>##

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,