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
import java.util.Scanner;
public class Main {
	void run(){
		Scanner s = new Scanner(System.in);
		String str = s.next();
		while(!"0".equals(str)){
			int num = 0;
			String st[] = str.split("");
			for(int i = 0;i < st.length;i++){
				num += Integer.valueOf(st[i]).intValue();
			}
			System.out.println(num);
			str = s.next();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.run();
	}
}