while read -r line; do 
  keyword=$(echo $line | sed -e 's/^[ \t]*//' -e 's/[ \t]*$//')
  keyword=$(echo $keyword | sed 's/ /.*/g')
  echo $keyword
  count=$(grep -ioE "$keyword" sort_u_domains.txt | wc -l)
  echo $keyword $count >> keyword_counts.txt
done < yahoo_seen.txt