perl found in file1.txt at line number 3
monks found in file1.txt at line number 6
perl found in file2.txt at line number 1
monks found in file2.txt at line number 1
website found in file3.txt at line number 1
perl found in file3.txt at line number 2
monks found in file3.txt at line number 2
website found in file3.txt at line number 2
website found in file3.txt at line number 5