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 () {
	string s;
	cin >> s;
	
	while (s != "0") {
		int sum = 0;
		for (int i = 0; i < s.size(); i ++)
			sum += (int)s[i] - 48;
		cout << sum << "\n";
		cin >> s;
	}
}
