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 <string>
#include <iostream>
using namespace std;

int main()
{
	string x;
	int s;
	cin.tie(0);
	while (cin >> x && x != "0") {
		s = 0;
		for (int i = 0; i < x.length(); i++) s += x[i] - '0';
		cout << s << "\n";
	}
}
