import java.util.Scanner; import java.io.FileWriter; import java.io.IOException;

public class Main { public static String isStringsAreMirroring(String input) { if (input.charAt(0) != input.charAt(input.length() - 1)) { return "No mirrored part"; }

    String repeatingSection = "";
    for (int i = 1; i < input.length() - 1; i++) {
        if (Character.toLowerCase(input.charAt(i)) == Character.toLowerCase(input.charAt(input.length() - 1 - i))) {
            repeatingSection += Character.toLowerCase(input.charAt(i));
        } else {
            break;
        }
    }

    if (repeatingSection.isEmpty()) {
        return "No mirrored part";
    } else {
        return repeatingSection;
    }
}

public static int countWordsEndingInYZ(String input) {
    String[] words = input.split("\\s+");
    int count = 0;
    for (String word : words) {
        char lastChar = Character.toLowerCase(word.charAt(word.length() - 1));
        if (lastChar == 'y' || lastChar == 'z') {
            count++;
        }
    }
    return count;
}
public static void printTriangle(int n) {
    try {
        FileWriter fileWriter = new FileWriter("triangle.txt");
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                fileWriter.write("!");
                System.out.print("!");
            }
            fileWriter.write("\n");
            System.out.println();
        }
        fileWriter.close();
    } catch (IOException e) {
        System.out.println("An error occurred while writing to the file.");
        e.printStackTrace();
    }
}
public static void drawSquareFrame(int n) {
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            if (i == 1 || i == n || j == 1 || j == n) {
                System.out.print("? ");
            } else {
                System.out.print("- ");
            }
        }
        System.out.println();
    }
}


public static void main(String[] args) {
    System.out.println("Enter the string to check if it is mirroring:");
    Scanner sc = new Scanner(System.in);
    String input = sc.nextLine();

    String repeatingSection = isStringsAreMirroring(input);
    System.out.println("Mirroring Section: " + repeatingSection);

    int wordCountYZ = countWordsEndingInYZ(input);
    System.out.println("Count of words ending in 'y' or 'z': " + wordCountYZ);
    System.out.println("Enter the value of n for the triangle:");
    int n = sc.nextInt();

    printTriangle(n);
    System.out.println("Triangle printed and saved to triangle.txt");
    System.out.print("Въведете цяло положително число n: ");
    int N = sc.nextInt();

    drawSquareFrame(N);
}

}