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;
	while (1) {
		cin >> str;
		if (str == "0") { return 0; }
		int summ=0;
		for (int i = 0; i < str.size(); i++) {
			summ += str[i]-'0';
		}
		cout << summ << endl;
	}


}
