#include<iostream>
#include<string>
using namespace std;
int main()
{
	string s;
	int i;
	while (1) {
		cin >> s;
		if (s[0]=='0') break;
		int sum = 0;
		for (i = 0; i < s.length(); i++)
			sum += s[i] - '0';
		cout << sum << 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 s;
	int i;
	while (1) {
		cin >> s;
		if (s[0]=='0') break;
		int sum = 0;
		for (i = 0; i < s.length(); i++)
			sum += s[i] - '0';
		cout << sum << endl;
	}
	return 0;
}
```