#include <iostream>
#include <string>
using namespace std;

int main(){
	string x;
	while (cin >> x){
		if (x == (string)"0") break;
		long s = 0;
		for (long i = 0; i < x.size(); i++) s += (char)x[i] - (long)'0';
		cout << s << endl;
	}
	return 0;
}
### 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>
#include <string>
using namespace std;

int main(){
	string x;
	while (cin >> x){
		if (x == (string)"0") break;
		long s = 0;
		for (long i = 0; i < x.size(); i++) s += (char)x[i] - (long)'0';
		cout << s << endl;
	}
	return 0;
}
```