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.

Example

Input

123
55
1000
0


Output

6
10
1
#include <iostream>
#include <string>
int main() {
    std::string x;
    for (std::cin >> x; x != "0"; std::cin >> x) {
        int s = 0;
        for (auto&& c: x) {
            s += c - '0';
        }
        std::cout << s << std::endl;
    }
}

