#include <iostream>
using namespace std;
int main(){
   string s;
   cin>>s;
    while(s[0]!='0'){
        int sum=0;
        for(int i=0; i<s.size(); i++){
            sum += s[i]-'0';
        }
        cout<<sum<<endl;
        cin>>s;
    }
    
}

### Prompt

Please provide a cpp coded solution to the problem described below:

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

### Response

```cpp
#include <iostream>
using namespace std;
int main(){
   string s;
   cin>>s;
    while(s[0]!='0'){
        int sum=0;
        for(int i=0; i<s.size(); i++){
            sum += s[i]-'0';
        }
        cout<<sum<<endl;
        cin>>s;
    }
    
}

```