"""
Pre-Programming 61 Solution
By Teerapat Kraisrisirikul
"""

def main():
    """ Main function """
    print(function_1())
    print(function_2())
    print(function_1())
    print(function_2())
    print(function_3())
    print(function_1())
    print(function_2())
    print(function_1())
    print(function_2())
    print(function_1())
    print(function_3())
    print(function_3())
    print(function_3())
    print(function_2())
    print(function_1())

def function_1():
    """ Function #1 """
    return "Problem Solving in Information Technology (PSIT)"

def function_2():
    """ Function #2 """
    return "Introduction to Computer Systems (ICS)"

def function_3():
    """ Function #3 """
    return "Information Technology Fundamentals (ITF)"

main()
