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;
class Main{
 public static void main(String[] args){
  String s;
  int i,g;
  Scanner sc = new Scanner(System.in);
  while(true){
   s=sc.next();
   if(s.equals("0"))break;
   g=0;
   for(i=0;i<s.length();i++)
    g+=s.charAt(i)-48;
   System.out.println(g);
  }
 }
}
