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)

import sys
 
BIG_NUM = 2000000000
MOD = 1000000007
EPS = 0.000000001
 
 
while True:
    table = str(input())
    if(table[0] == '0'):
        break
    print(sum(int(num) for num in(table)))