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);
    int ans;
    String x;
    char c;

    for (int i = 0;; i++) {
      x = sc.next();
      if (x.equals("0")) break;
      ans = 0;
      for (int j = 0; j < x.length(); j++) {// ans 算出
        c = x.charAt(j);
        ans += c - '0';
      }
      System.out.printf("%d\n", ans);
    }

    sc.close();
  }
}

