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(void)
{
	for(string num; cin >> num, num != "0"; ) {
		int sum = 0;

		for(int i = 0; i < num.length(); i++)
			sum += num[i] - '0';
	
		cout << sum << endl;
	}

	return 0;
}