#include <bits/stdc++.h>

using namespace std;

int main() {
	string x;
	while (cin >> x && x[0] != '0') {
		int sum = 0;
		for (auto c: x) {
			sum += c - '0';
		}
		cout << sum << '\n';
	}
}

### 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 <bits/stdc++.h>

using namespace std;

int main() {
	string x;
	while (cin >> x && x[0] != '0') {
		int sum = 0;
		for (auto c: x) {
			sum += c - '0';
		}
		cout << sum << '\n';
	}
}

```