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

int main() {
	string str;
	while(cin >> str && str != "0") {
		int len = str.length(), sum = 0;
		for(int i = 0; i < len; i++) sum += str[i] - '0';
		cout << sum << '\n';
	}
	return 0;
}

### Prompt

Your task is to create 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 str;
	while(cin >> str && str != "0") {
		int len = str.length(), sum = 0;
		for(int i = 0; i < len; i++) sum += str[i] - '0';
		cout << sum << '\n';
	}
	return 0;
}

```