for j in `ls -C`
do
for k in `ls -C $j`
do
for i in `ls -C $j/$k/*.html`
do
echo $j/$k/$i
sed -i 's,https://www.chemie.uni-bonn.de/pctc/mulliken-center/software/GMTKN/gmtkn55,https://www.chemie.uni-bonn.de/grimme/de/software/gmtkn/gmtkn55,g' $i
done
done
done