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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


class Main{
	public static void main(String[] args) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		while(true){
			String str=br.readLine();
			if(str.equals("0"))break;
			int t=0;
			for(int i=0;i<str.length();i++){
				t+=Character.getNumericValue(str.charAt(i));
			}System.out.println(t);
		}
		}}