Problem:
Sum of Numbers

Write a program which reads an integer and prints sum of its digits.

Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in Python3 (judge verdict: Accepted)

while True:
    n = int(input()) #数値の入力
    if n == 0: #０だった時終了
        break
    l = [int(i) for i in list(str(n))] #入力した数値を各桁ずつリストに入れる
    print(sum(l))