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 <bits/stdc++.h>
using namespace std;

int main(void)
{
    for(string s; cin>>s, s != "0";){
        int sum = 0;
        for(int i=0; i<(int)s.length();i++){
            sum += s[i]-'0';
        }
        cout << sum <<endl;
    }
}
