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
public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
		while(true){
			String x = scan.nextLine();
			if("0".equals(x)){
				break;
			}
			int sum = 0;
			for(char v : x.toCharArray()){
				sum += Integer.parseInt(String.valueOf(v));
			}
			System.out.println(sum);
		}
	}

}