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>
using namespace std;

int main(){
    int sum;
    string x;
    cin>>x;
    while(x[0]!='0'){
        sum=0;
        for(int i=0;i<(int)x.size();i++)sum+=x[i]-'0';
        cout<<sum<<endl;
        cin>>x;
    }
}
