void searchLetters(String letters)
	{
		letters = letters.toLowerCase();

		for (int i = 0; i < ht.size(); i++) {
			String station = (String)ht.get(i);

			int falseCounter = 0;

			for (int j = 0; j < letters.length(); j++) {
				String searchChar = Character.toString(letters.charAt(j));

				if (! station.toLowerCase().contains(searchChar)) {
					falseCounter++;

					if (falseCounter == letters.length()) {
						System.out.println(station);
						break;
					}

				}
			}
		}
	}