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 main() {
		Scanner sc = new Scanner(System.in);
				while(true) {
					String str = sc.nextLine();
					if(str.equals("0")) break;
					int l = str.length();
					int sum = 0;
					for(int i=0;i<l;i++) {
						char c = str.charAt(i);
						sum += c - '0';
					}
					System.out.println(sum);
				}
			}
			public static void main(String[] args) {
		new Main().main();
	}
}

