while am using the following input as 'n' in the function (1,12,123,1234,12345,123457..etc) the result obtained is as expected however if I change the sequence (if I used 434, 567, ) I got a different answer.

digit_sum(1234)

[1, 2, 3, 4]

10

correct BUT

digit_sum(434)

[1, 2, 3]

6 INSTEAD of 11.

```
def digit_sum(n):
digit_list = []
word_list = list(str(n))
counter = len(word_list)
for string_number in range(1,counter + 1):
digit_list.append(string_number)
print(digit_list) # Use to check content of digit_list
add_digit = sum(digit_list) # Calculating sum
print(add_digit)
```