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);
while(true){
 int ans=0;
 String r=sc.next();
   if(r.equals("0"))break;
for(int i=0;i<r.length();i++){
    ans+=Character.getNumericValue(r.charAt(i));
}
 
 
 System.out.println(ans);
}
}
}
