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);
    String x;
    int S = 0;
    while(true){
      x = sc.next();
      if(x.equals("0")){
        break;
      }
      for(int i=0;i<x.length();i++){
        S += x.charAt(i) - '0';
      }
      System.out.println(S);
      S = 0;
    }
  }
}
