PREUN

/bin/sh

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

POSTIN

/bin/sh

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