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

		while(true){
			sum = 0;
			String inp = br.readLine();
			if(inp.equals("0")){
				break;
			}
			char[] ch = inp.toCharArray();
			for(char c : ch){
				sum += Character.getNumericValue(c);
			}
			System.out.println(sum);
		}
    }
}