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 str;
	cin >> str;
	if(str == "0") break;
	int sum = 0;
	for(int i=0; i<str.size(); i++) {
	    char ch = str[i];
	    sum += (ch - '0');
	}
	cout << sum << endl;
    }
}