#!/bin/sh

# This list may not be sorted, so if that is desired be sure to pipe the output through sort.
dpkg -l | \
  grep '^ii' | \
  awk '{ print $2 }' | \
  xargs -P4 -I, /bin/sh -c '[ "$(apt-cache rdepends --installed , | wc -l)" = "2" ] && echo ,'