Write a bash script that takes each line of 1 text file and counts the number of strings that it finds in a 2nd text file. The 2 text files both contain a lists of strings.

Example:

file1.txt - bill, bob, terry, sam, george

file2.txt - sam, jake, john, elliot, bob

The script would output 2 since there are 2 names in the first text file found in the 2nd text file.