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;
import java.util.ArrayList;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    while(true){
      int sum=0;
      String S = sc.next();
      if(S.equals("0")){
        break;
      }else{
        char[] c = S.toCharArray();
        for(int i=0;i<c.length;i++){
          sum += (int)(c[i]-'0');
        }
          System.out.println(sum);
      }
    
    }
  }
}
