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

### Prompt

Develop a solution in CPP to the problem described below:

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 x;
	int y;
	while(cin>>x && x!="0"){
		y = 0;
		for(int i = 0,l = x.size();i<l;i++) y += x[i]-'0';
		cout<<y<<endl;
	}
}

```