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>
#include <numeric>
using namespace std;

int main() {
    string s;
    while(cin >> s, s != "0") {
        cout << accumulate(s.begin(), s.end(), 0) - 48 * s.size() << endl;;
    }
}
