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)

try:
    while True:
        for i in range(10000):
            a = input()
            taiga = 0
            if a == 0:
                break
            b = len(a)
            for c in range(b):
                taiga += int(a[c])
            if taiga == 0:
                continue
            else:
                print(taiga)
except EOFError:
    pass