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


```