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);

    boolean tmp = true;

    while(tmp){
      String s = sc.next();
      int ans = 0;

      if(s.equals("0")){
        tmp = false;
        break;
      }

      for(int i = 0; i < s.length(); i++){
        ans += s.charAt(i) - '0';
      }

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

