sed -e 's/\.//g' -e 's/,//g' -e 's/\!//g' -e "s/\'//g" -e "s/\"//g" -e 's/-//g' longfile.txt | tr ' ' '\012' | tr [:upper:] [:lower:] | sed -e '/^$/d' | sort | uniq -c | sort -n | tail -20