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>
#include<string>
using namespace std;

int main(){
	string s;
	int ans = 0;

while (1){
	cin >> s;
	if (s == "0"){ break; }
	for (int i = 0; i < s.size(); i++){
		ans += s[i] - 48;
	}
	cout << ans << endl;
	ans = 0;
}

	return 0;
}
