#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  int sum;
  while(1){
    cin >> s;
      sum = 0;
    for(int i=0;i<s.size();i++){
      sum += s.at(i) - '0';
    }
    if(sum!=0) cout << sum << endl;
    else break;
  }
}


### 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<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  int sum;
  while(1){
    cin >> s;
      sum = 0;
    for(int i=0;i<s.size();i++){
      sum += s.at(i) - '0';
    }
    if(sum!=0) cout << sum << endl;
    else break;
  }
}


```