import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Registration {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = Integer.parseInt(sc.nextLine());
        String regex =
                "^(U\\$)(?<username>[A-Z][a-z]{2,})\\1(P@\\$)(?<password>[A-Za-z]{5,}[0-9]+)\\3$";
        Pattern pattern = Pattern.compile(regex);
        int sr = 0;
        while (n>0) {
            String input=sc.nextLine();
            Matcher matcher = pattern.matcher(input);
              if(matcher.matches()){
                String username = matcher.group("username");
                String password = matcher.group("password");
                System.out.println("Registration was successful");
                System.out.println("Username: " + username + ", Password: " + password);
                sr++;
            } else {
                System.out.println("Invalid username or password");
            }
              n--;
        }
        System.out.println("Successful registrations: " + sr);
    }

}