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 str;

	while(1){

		int sum=0;
		getline(cin,str);

		if(str[0]=='0') break;

		for(int i=0; i<str.size(); i++){
			sum += str[i] - '0';
		}
		cout << sum << endl;
	}
}