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in reply to Re^24: Addional "year" matching functionality in word matching script
in thread Addional "year" matching functionality in word matching script

That's because
while (<CSV1>) {

in fact means

while (defined( $_ = <CSV1> )) {
($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,