file1.py - print an interesting message about Berlin
file2.py - print an interesting message about Beijing
file3.py - print an interesting message about New York
file4.py - print an interesting message about Paris
file5.py - print an interesting message about London
Call them
file1.py - print an interesting message about Berlin file2.py - print an interesting message about Beijing file3.py - print an interesting message about New York file4.py - print an interesting message about Paris file5.py - print an interesting message about London