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 A;
	
	while( cin >> A) {
	
	int sum = 0;
	
	if( A == "0")
	break;
	
	for(int i=0;i<A.length();i++) {
		
		sum += A[i] - 48;
		
	}
	
	cout << sum << "\n";
}
	return 0;
}
