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.io.*;

public class Main{
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		while(true){
			int sum = 0;
			String str = br.readLine();
				if(str.equals( "0")){
					break;
				}

				for(char c : str.toCharArray()){
					sum += Integer.parseInt("" + c);
				}
			System.out.println(sum);
		}
	}
}