PREUN

/bin/sh

if [[ "$1" = "0" ]]; then
  perl -ni -e "/^DICT\s*km\s*KH\s*km_KH$/ or print" /usr/share/dict/ooo/dictionary.lst
fi

POSTIN

/bin/sh

if [[ ! -f "/usr/share/dict/ooo/dictionary.lst" ]] ||       ! grep -q "^DICT[ \t]*km[ \t]*KH[ \t]*km_KH" /usr/share/dict/ooo/dictionary.lst
then
  echo "DICT km KH km_KH" >> /usr/share/dict/ooo/dictionary.lst
fi