// Arrays.asList(...) returns List that doesn't support remove(), hence
// we wrap it with an ArrayList to avoid UnsupportedOperationException
// when doing a remove()
charactersAvailable = new ArrayList<Character>(Arrays.asList(
new Character[] {
Character.valueOf('A"), Character.valueOf('B"), Character.valueOf('C"),
Character.valueOf('D"), Character.valueOf('E"), Character.valueOf('F"),
Character.valueOf('G"), Character.valueOf('H"), Character.valueOf('I"),
Character.valueOf('J"), Character.valueOf('K"), Character.valueOf('L"),
Character.valueOf('M"), Character.valueOf('N"), Character.valueOf('O"),
Character.valueOf('P"), Character.valueOf('Q"), Character.valueOf('R"),
Character.valueOf('S"), Character.valueOf('T"), Character.valueOf('U"),
Character.valueOf('V"), Character.valueOf('W"), Character.valueOf('X"),
Character.valueOf('Y"), Character.valueOf('Z")
}));
charactersGuessed = new ArrayList<Character>();
this.vocab = vocab;
