unset LC_CTYPE LC_COLLATE LANG LANGUAGE
LC_ALL=C
export LC_ALL

e=
for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f; do
	for j in 0 1 2 3 4 5 6 7 8 9 a b c d e f; do
		case $i$j in
		00) continue ;;
		esac
		e="$e\x$i$j"
	done
done

# Start a new shell so the locale change is picked up.
ee="$(${SH} -c "printf %s \$'$e'")"
[ "${#ee}" = 255 ] || echo length bad