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)

values = []
while True:
    value = input()
    if value == "0":
        break
    else:
        values.append(value)

for value in values:
    summation = 0
    for i in range(len(value)):
        summation += int(value[i])
    print(summation)