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;
public class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    while(true){
      String line = sc.nextLine();
      int a = line.length();
      char num;
      int Sum=0;
      int i=0;
      while(i<a){
        num = line.charAt(i);
        Sum += (num-'0');
        i++;
      }if(line.charAt(0)=='0'&&a==1) break;
      System.out.println(Sum);
    }
    sc.close();
  }
}
