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>
using namespace std;

int main(){
    string str;
    while(1){
        int sum=0;
        cin >> str;
        if(str=="0") break;
        for(int i=0;str.length()>i;i++) sum+=str[i]-'0';
        cout << sum << endl;
    }
}
