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

int main() {
	string x;

	for (;;) {

		int ans=0;

		cin >> x;
		if (x == "0")break;

		for (int i = 0; i < x.size(); i++) {
			ans += x[i]-'0';
		}
		cout << ans << endl;
	}
	return 0;
}
### Prompt

Generate a cpp solution to the following problem:

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;

	for (;;) {

		int ans=0;

		cin >> x;
		if (x == "0")break;

		for (int i = 0; i < x.size(); i++) {
			ans += x[i]-'0';
		}
		cout << ans << endl;
	}
	return 0;
}
```