String passwordText = this.passwordInputField.getText();
for (char character : passwordText.toCharArray()) {
    if (!this.allKeyboardChars.contains(character)) {
        this.passwordInvalidLabel.setText("I don't understand " + character);
        this.passwordInvalidLabel.setVisible(true);
        return false;
    }
}

{
  name: Foo,
  trigger: onEndOfTurn() {
    trigger: probability(0.50) {
      action: drawCard(1) {
        target: self("hand")
      }
    }
  }
}

{
  name: "Steal Card",
  manaCost: 5,
  trigger: onCast() {
    target: opponent("hand") {
      action: take("randomCard") {
        target: self("hand")
      }
    }
  }