public static List<Planet> interestingPlanets(PlanetWars pw){
        List<Planet> asw = new ArrayList<Planet>();
        for (Planet p : pw.NotMyPlanets()){
            if (p.NumShips()<p.GrowthRate()*2)	// We've got 2 turns before an eventual attack; that's why rentability is calculated that way
                asw.add(p);
        }
        for (Planet p : pw.EnemyPlanets()){
            asw.add(p);
        }
  		return asw;
  	}