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){
  String b = sc.next();
  int a = b.length();
  int goukei = 0;
  int kazu[] = new int [a];

  if(b.equals("0"))
    break;
  for(int i = 0; i<a; i++){
    kazu[i] = b.charAt(i)-'0';
    goukei += kazu[i];
  }
  System.out.println(goukei);
}

}
}

