public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.print("Enter a string that may or may not be a palindrome: ");
    String maybePalindrome = s.nextLine();
    String maybePalindromeProcessed = FirstSubroutines.removeSpecialCharsAndLowercase(maybePalindrome);
    String maybePalindromeProcessedReversed = FirstSubroutines.reverse(maybePalindromeProcessed);

    if (maybePalindromeProcessed.equals(maybePalindromeProcessedReversed) {
        System.out.println("Palindrome!");
    } else {
        System.out.println("Not a palindrome!");
    }
}

public static String removeSpacialCharsAndLowercase(String str) {
    // Your own remove-special-chars-and-convert-to-lowercase code here
    return str
}

public static String reverse(String str) {
    // Assignment 4's reverse-string code here
    return str
}