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.*;
class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
				
		while(true){
			String dat = sc.next();
			char[] num = dat.toCharArray();
			int sum = 0;
			if(dat.equals("0")) return;

			for(int i=0;i<dat.length();i++){
				sum = sum + (num[i] - '0'); 
			}

			System.out.println(sum);
		}	
		}
	}
