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> 
using namespace std;

int main() {
	
	while (1) {
		string s; cin >> s;

		if (s == "0")break;

		int sum = 0;

		for (char c : s) {
			sum += (c - '0');
		}

		cout << sum << endl;
	}

	return 0;
}

