module top;
wire [7:0] top;
wire [2:0] x;
assign x = 0;
assign top = 8'hFF;
initial begin
#1;
$display("%b %b", x, top);
$display("%b %b", x[0], top[0]);
$display("%b %b", x[1:0], top[1:0]);
$display("%b %b", x[0+:1], top[0+:1]);
end
endmodule