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(){
	string x;
	int k=0;
	while(true){
		cin>>x;
		if (x=="0")break;
		for(int i=0;i<x.size();i++){
			k+=x[i]-'0';
			}
		cout<<k<<endl;
		k=0;
		}
 return 0;
 }

