Cicada 3301 4chan /x/ check-script

while [ 1 ] ;
do
        curl -s http://boards.4chan.org/x/catalog | grep -o -P '"imgurl":".{0,13}' | sed 's:.*"::;s:$:.jpg:' | while read -r img; do [ -e $img ] || (wget -q "http://i.4cdn.org/x/src/$img"; [ -e $img ] || touch $img; outguess -r $img $img.txt; [ -s $img.txt ] || rm $img.txt; [ -e $img.txt ] && (gpg --verify $img.txt || rm $img.txt ) ) ;  done ;
done