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()
{
	std::string s;
	for (;;) {
		std::cin >> s;
		if (s[0] == '0') break;
		int sum {};
		for (int i=0; s[i]; ++i)
			sum += s[i] - '0';
		std::cout << sum << '\n';
	}
}