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.io.*;
import java.util.*;
import java.lang.*;

class Main{
  public static void main(String[] args) throws java.lang.NumberFormatException{
    Scanner scan=new Scanner(System.in);

    while(true){
      String num=scan.next();
      if(num.equals("0"))break;

      long sum=0;

      for(int i=0;i<num.length();i++){
        sum+=Character.getNumericValue(num.charAt(i));
      }
      System.out.println(sum);
    }
  }
}
