Shell Programming and Scripting

$cat file1.txt

a b c 
d e f


$cat file2.txt

f g h
g h j

$cat file3.txt

a b d 
f g h


Expected output (with column header)

$cat out.txt

file1.txt file2.txt file3.txt
b g b
e h g

ls directory-name | while read line
do
touch output.txt
echo $line > temp.txt
cut -d' ' -f2 $line >> temp.txt
paste temp.txt output.txt > output2.txt
cp output2.txt output.txt
rm output2.txt
rm temp.txt
done