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(){
	
	while(1){
		string x;
		int sum = 0;

		getline(cin, x);
		if(x == "0") break;

		for(int i=0;i<x.length();i++){
			sum += x[i] - 48;
		}

		cout<<sum<<endl;
	}

	return 0;
}