public State getNextState(State s, Action a) {
		State succState = s.clone();
		// TODO: fill out this function
		switch(a) {
			case TURN_ON:
				succState.turned_on = true;
				break;
			case TURN_OFF:
				succState.turned_on = false;
				break;
			case TURN_RIGHT:
				succState.orientation += 1;
				succState.orientation %= 4;
				break;
			case TURN_LEFT:
				succState.orientation -= 1;
				if(succState.orientation < 0) {
					succState.orientation += 4;
				}
				succState.orientation %= 4;
				break;
			case GO:
				switch (succState.orientation) {
					case 0:
						succState.position.y++;
						break;
					case 1:
						succState.position.x++;
						break;
					case 2:
						succState.position.y--;
						break;
					case 3:
						succState.position.x--;
						break;
				}
				break;
			case SUCK:
				succState.dirt.remove(succState.position.clone());
				break;
		}
		//System.out.println("move: " + a + " -> next state: " + succState);
		return succState;
	}