#include <bits/stdc++.h>
using namespace std;
int main(){
	string s;
	while(cin>>s){
		int i,c=0;
		if(s[0]=='0')break;
		for(i=0;i<s.size();i++)c+=s[i]-'0';
		cout<<c<<endl;
	}
}
### Prompt

Please create a solution in Cpp 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 <bits/stdc++.h>
using namespace std;
int main(){
	string s;
	while(cin>>s){
		int i,c=0;
		if(s[0]=='0')break;
		for(i=0;i<s.size();i++)c+=s[i]-'0';
		cout<<c<<endl;
	}
}
```