#include<iostream>
#include<string>
using namespace std;
int main(){
	string row;
	while(1){
		int sum=0;
		cin>>row;
		if(row=="0")break;
		for(int i=0;i<row.size();i++){
			sum+=row[i]-'0';
		}
		cout<<sum<<endl;
	}
	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 row;
	while(1){
		int sum=0;
		cin>>row;
		if(row=="0")break;
		for(int i=0;i<row.size();i++){
			sum+=row[i]-'0';
		}
		cout<<sum<<endl;
	}
	return 0;
}

```