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 scanner = new Scanner(System.in);
    while(true){
    String a = scanner.next();
    if(a.equals("0")) break;
    int sum = 0;
    for(int i = 0; i < a.length(); i++){
      char num = a.charAt(i);
      sum += Integer.parseInt("" + num);
    }
    System.out.println(sum);
    }
  }
}