import java.util.ArrayList;

public class TestLifeSupportSim
{
public static void main(String[] args)
{
    ArrayList aList = new ArrayList();
    V2Radiator v2 = new V2Radiator(aList);
    V3Radiator v3 = new V3Radiator(aList);
    for (int z = 0; z < 20; z++)
    {
        RetentionBot ret = new RetentionBot(aList);
    }

int totalPower = 0;
         for(Object o : aList)
       {
        totalPower += ((SimUnit) o).powerUse();
    }
    System.out.println("Total power: " + totalPower);
    }
    }

class V2Radiator {
    V2Radiator(ArrayList list) {
    System.out.println("making a v2 radiator");
    for(int x=0; x<5; x++)
    {
        list.add(new SimUnit("V2Radiator"));
    }
     }
    }
     class V3Radiator extends V2Radiator{
    V3Radiator(ArrayList list) {
    super(list);
    for(int g=0; g<10; g++)
    {
        list.add(new SimUnit("V3Radiator"));
    }
    }
    }
    class RetentionBot {
     RetentionBot(ArrayList rlist) {
    rlist.add(new SimUnit("Retention"));
   }
   }
  class SimUnit {
  String botType;
  SimUnit(String type) {
    botType = type;
   }
  int powerUse() {
    if ("Retention".equals(botType))
    {
        return 2;
    }
    else
    {
        return 4;
    }
      }
    }