PREUN

/bin/sh

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

POSTIN

/bin/sh

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