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


int main()
{
	string s;

	while (cin >> s)
	{
		if (s == "0") return 0;

		int sum = 0;
		for (char c : s)
		{
			sum += (c - '0');
		}
		cout << sum << endl;
	}
	return 0;
}
### Prompt

Construct a cpp code solution to the problem outlined:

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 s;

	while (cin >> s)
	{
		if (s == "0") return 0;

		int sum = 0;
		for (char c : s)
		{
			sum += (c - '0');
		}
		cout << sum << endl;
	}
	return 0;
}
```