`timescale 1ps/1ns
module sn7409
  #(parameter tPLH = 0, tPHL = 0)
  (input [3:0]	A,
   input [3:0]	B,
   output [3:0]	Y);
   
   assign #(tPLH, tPHL) (strong0, highz1) Y = A & B;
endmodule