module tach_so_tb();
//Khai bao input
reg[5:0] in;
//Khai bao output
wire[3:0] hangchuc, hangdvi;
//Start
tach_so ins(
.in      (in),
.hangchuc(hangchuc),
.hangdvi (hangdvi)
);
initial begin
$display("\ttime\tin\thangchuc\thangdonvi");
$monitor("%d\t%d\t%d\t%d", $time,in,hangchuc,hangdvi);
in = 0;
#1 in = 2;
#2 in = 11;
#4 in = 20;
#2 in = 21;
#2 in = 35;
#2 in = 46;
#5 in = 50;
end
endmodule