// Doesn't check for things like trailing white space or blank lines;
// need to decide on a length limit for the input string?

import java.util.*;

public class verify {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    boolean error = false;
    String s = in.nextLine();
    for (int i = 0; i < s.length(); i++) {
      char c = s.charAt(i);
      if (c < 'A' || c > 'Z') {
        System.out.println("Bad char in position "+i);
        error = true;
      }
    }
    if (error) System.exit(1);
    else System.exit(42);
  }
}