#!/bin/sh

list=$(wmctrl -l)

num=$(echo "$list" | awk '{ $1=$2=$3=""; gsub(/^ */,""); printf "%3d - %s\n", NR, $0; }' | dmenu -l 20 -p "window" | cut -d '-' -f 1)
[ -z "$num" ] && exit
echo "$list" | awk -v N="$num" 'NR == N { print $1; }' | xargs -r wmctrl -i -a