private void processInput(KeyEvent e) {
            Integer keyNum = e.getKeyCode();
            Character keyChar = Character.toLowerCase(e.getKeyChar());
            if (ACCEPTED_KEYS.contains(keyChar.toString())) {
                decodeInput(keyChar);
            } 
            for(int i=0;i<ACCEPTED_NUM_KEYS.length;i++){
                if(ACCEPTED_NUM_KEYS[i] == keyNum){
                    decodeNumberInput(keyNum);
                }
            }
	}