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
class SumOfDigits:
    
    def __init__(self, num):
        self.num = num
    
    def calculate_sum_of_digits(self):
        total = 0
        for ch in str(self.num):
            total += int(ch)
        return total

digit_sum = SumOfDigits(6342)
result = digit_sum.calculate_sum_of_digits()
print(result)
user
15
assistant