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

### 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>
using namespace std;
string s;
int main() {
	while (cin >> s, (s[0] - '0')) {
		int a = 0;
		for (int i = 0; i < s.size(); i++) a += s[i] - '0';
		cout << a << endl;
	}
}

```