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

