public class TopSecret
{
	public static void main(String [] args)
	{
		char [] array1 = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p',
                                  'q','r','s','t','u','v','w','x','y','z','.','!',' '};
		char [] array2 = {'l','x','g','r','j','w','!','i','q','a','t','z','.','s','y','k',
                                  'e','o',' ','p','d','c','h','n','v','u','f','b','m'};
		String secretMessage = "lpoyjkhmj sjygporjoplmhksdy.s.hjlzomrghljow
                                        qjxhyrdomlhhqspyismh.llosrvpmypsqj.hxjqopl ";

		String start = "top secret";

		String result = decode(secretMessage, array1, array2);
		String palindrome = everyOther(result,0);
		String message = everyOther(result,1);

		if(checkPalindrome(palindrome))
		{
			if(checkSecrecy(message, start))
			{
				System.out.print("Your secret mission is: ");
				System.out.println(message.substring(start.length()+1,message.length()));
			}
			else
				System.out.println("This message is a fake!");
		}
		else
			System.out.println("This message is a fake!");
	}

	public static boolean checkSecrecy(String message, String start)
	{
		boolean result = false;

		if(message.substring(0,start.length()).equals(start))
			result = true;

		return result;      
	}

	public static boolean checkPalindrome(String str)
	{
		boolean result = true;

		for(int i = 0; i < str.length() / 2; i++)
		{
			if(str.charAt(i) != str.charAt(str.length() -1 - i))
				result = false;    
		}

		return result;
	}

	public static String everyOther(String str, int num)
	{
		String result = "";

		for(int i = 0; i < str.length(); i++)
		{
			if(i % 2 == num)
			result += str.charAt(i);
		}

		return result;
	}

	public static String decode(String message, char [] array1, char [] array2)
	{
		String result = "";

		for(int i = 0; i < message.length(); i++)
		{
			for(int j = 0; j < array1.length; j++)
			{
				if(message.charAt(i) == array2[j])
					result += array1[j];
			}
		}

		return result;
	}
}