PREUN

/bin/sh

if [[ "$1" = "0" ]]; then
  perl -ni -e "/^THES\s*pl\s*PL\s*th_pl_PL$/ or print" /usr/share/dict/ooo/dictionary.lst
fi

POSTIN

/bin/sh

if [[ ! -f "/usr/share/dict/ooo/dictionary.lst" ]] ||       ! grep -q "^THES[ \t]*pl[ \t]*PL[ \t]*th_pl_PL" /usr/share/dict/ooo/dictionary.lst
then
  echo "THES pl PL th_pl_PL" >> /usr/share/dict/ooo/dictionary.lst
fi