You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
# Dictionary of numbers and words
DAYS = {
    1:'one',
    2:'two',
    3:'three',
    4:'four',
    5:'five',
    6:'six',
    7:'seven',
    8:'eight',
    9:'nine',
    10:'ten',
}

def num_to_str(num):
    if num in DAYS:
        return DAYS[num]
    else:
        return "invalid number"

if __name__ == '__main__':
    num = 5
    print(num_to_str(num))
user
five
assistant