class Cell
{
 private boolean alive = false;

 public boolean isAlive()
 {
 return alive;
 }

 public void setAlive(boolean alive)
 {
 this.alive = alive;
 }

 public void update(int neighbour)
 {
 if (neighbour < 2 || neighbour > 3)
 {
 alive = false;
 }
 else if (neighbour == 3)
 {
 alive = true;
 }
 // else neighbour == 2 keep alive unchanged
 }
}