#!/bin/bash
for input; do
	for q in screen ebook printer prepress; do
		output=${input%.pdf}-$q.pdf
		time gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/$q -sOutputFile="$output" "$input"
	done
done