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 x;
	int sum;
	while (cin >> x, x.compare("0")) {
		sum = 0;
		for (int i = 0; i < (int) x.size(); ++i) {
			sum += x.at(i) - '0';
		}
		cout << sum << endl;
	}
	return 0;
}