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(){
    string s;
    cin >> s;
    while(s[0] != '0'){
        int ret = 0;
        for(auto it : s) ret += (it - '0');
        cout << ret << endl;
        cin >> s;
    }
 return 0;
}
