#include <iostream>
using namespace std;
 
int main() {
	string s;
	getline(cin, s);
	while (s != "0"){
		int a = 0;
		for (int i = 0; i < s.size(); i++){
			a += (s[i] - 48);
		}
		cout << a << endl; 
		getline(cin, s);
	}
	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>
using namespace std;
 
int main() {
	string s;
	getline(cin, s);
	while (s != "0"){
		int a = 0;
		for (int i = 0; i < s.size(); i++){
			a += (s[i] - 48);
		}
		cout << a << endl; 
		getline(cin, s);
	}
	return 0;
}

```