switch (i) {
case 1: comm = new Food();break;
case 2: comm = new Energy();break;
case 3: comm = new Water();break;
case 4: comm = new AnimalEmbryos();break;
case 5: comm = new Ore();break;
case 6: comm = new Metal();break;
case 7: comm = new Electronics();break;
case 8: comm = new Robots();break;
case 9: comm = new HeavyPlastics();break;
case 10: comm = new HandWeapons();break;