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 <bits/stdc++.h>
using namespace std;

int	main()
{
	string	str;
	int	sum;
	while (cin >> str) {
		if (str == "0") break;
		sum = 0;
		for (auto c : str) {
			sum += c - '0';
		}
		cout << sum << "\n";
	}
}
