def make_list_uppercase(original_list):
    '''Return a list of strings that contains the words from
       list original_list but in all uppercase letters.'''

    uppercase_list = []
    for s in original_list:
        uppercase_list.append(s.upper())
    return uppercase_list        

def square_list(int_list):
    '''Return a list that contains the ints from list int_list
       squared'''

    squared_list = []
    for i in int_list:
        squared_list.append(i**2)
    return squared_list        

def grade(myAns,correctAnswer):
    if myAns == correctAnswer:
       print("Correct, the answer is",myAns)
    else:
       print("My answer is",myAns,"but the correct answer is",correctAnswer)

def main():
    instructors = ["Jen","David","Rover","Paul"]
    for s in instructors:
        print(len(s))

    grade( make_list_uppercase(["Hello", "My Friendly", "Kitten"]),\
         ['HELLO', 'MY FRIENDLY', 'KITTEN'])
    grade(make_list_uppercase([]),[])
    grade(square_list([0,1,2,3,4]),[0, 1, 4, 9, 16])

main()