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>

int main()
{

	while (true) {
		std::string x;
		std::cin >> x;
		if (x == "0") break;

		int sum = 0;
		for (int i = 0; i < x.size()
			; i++) {
			sum += x[i] - '0';
		}
		std::cout << sum << std::endl;
	}
}