#include <iostream.h>
#include <stdlib.h>

int main()
{
  bool **floor;
  int W, H, i, j, areaNotCovered;
  int rw, rh, x, y;
  cin >> W;
  cin >> H;
 
  while(true)
    {
      if(cin.eof())
	break;

      areaNotCovered = W*H;
      
      floor = (bool**)malloc(W * sizeof(bool*));
      for(i=0; i<W; i++)
	{
	  floor[i] = (bool*)malloc(H * sizeof(bool));
	  for(j=0; j<H; j++)
	    floor[i][j] = 0;
	}
      
      while(true)
	{
	  cin >> rw;
	  cin >> rh;
	  cin >> x;
	  cin >> y;
	  if(rw == 0 & rh == 0 & x == 0 & y == 0)
	    break;

	  areaNotCovered -= ((rw) * (rh)); 
	  for(i=x; i<rw + x; i++)
	    {
	      for(j=y; j<rh + y; j++)
		{
		  if(!floor[i][j])
		    floor[i][j] = 1;
		  else
		    {
		      areaNotCovered += 1;
		    }
		}
	    }
	}

      cout << "Floor has " << areaNotCovered << " area not covered" << endl;

      cin >> W;
      cin >> H;
    }
  
  return 1;
}