public void makeCrypt(){
		ArrayList<Character> charSet = new ArrayList<Character>();
		Random randomGenerator = new Random();
		for(int i = 65; i < 91; i++){
			charSet.add((char)(i));
		}
		for (int i = 65; i < 91 ; i++){
			char oldChar = (char)(i);
			int rand = randomGenerator.nextInt(charSet.size());
			char newChar = charSet.get(rand);
			while(newChar == oldChar){
				rand = randomGenerator.nextInt(charSet.size());
				newChar = charSet.get(rand);
			}
			bigTable.put(oldChar, newChar);
			charSet.remove(rand);
		}
		for(int i = 97; i < 123; i++){
			charSet.add((char)(i));
		}
		for (int i = 97; i < 123 ; i++){
			char oldChar = (char)(i);
			int rand = randomGenerator.nextInt(charSet.size());
			char newChar = charSet.get(rand);
			while(newChar == oldChar){
				rand = randomGenerator.nextInt(charSet.size());
				newChar = charSet.get(rand);
			}
			bigTable.put(oldChar, newChar);
			charSet.remove(rand);
		}
	}