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>
using namespace std ;
int main() {
	
	
	string a ;	
	cin >> a ;	
	int sum = 0;
	
	while ( a != "0") {
		for (int i=0 ; i <a.size() ; i++){
			sum = sum + a[i] - 48;	
		}	
		cout << sum << endl;
		sum=0;   
		cin >> a;
	}	
}
