module pr2973532;
wire [15:0] a;
wire [7:0] b;
wire [7:0] c;
assign b[5:2] = 4'b1111;
assign c = 8'b00000000;
assign a = {b, c};
initial begin
#1;
$display("%b", a);
if (a === 16'bzz1111zz00000000)
$display("PASSED");
else
$display("FAILED");
end
endmodule