initial
  begin
    $dumpvars;
    $dumpfile ("hw109p3");
    a = 5;
    b = 4;
#10 a = -20000;
    b = -4;
#10 a = 6;
    b = -5;
#10 a = -100;
    b = 15;	
#10 a = 32767;
    b = 2
#10 a = 100;
    b = 2;
#10 $finish;
  end