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.*;
public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int sum=0,len=0;
		while(true){
			str=sc.nextLine();
			if(str.equals("0")==false){
				sum=0;
				len=str.length();
				for(int i=0;i<len;i++){
					sum+=Integer.parseInt(str.substring(i,i+1));
				}
				System.out.println(sum);
			}
			else{
				break;
			}
		}
	}
}
