#include <iostream>
using namespace std;
int main() {
	string line;
	while (cin >> line && line != "0") {
        int sum = 0;
		for (char ch: line) sum += ch - '0';
        cout << sum << endl;
	}
    return 0;
}

### Prompt

Please create a solution in CPP 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>
using namespace std;
int main() {
	string line;
	while (cin >> line && line != "0") {
        int sum = 0;
		for (char ch: line) sum += ch - '0';
        cout << sum << endl;
	}
    return 0;
}

```