module bitwise_ops_demo(
input [3:0]A,
input [3:0]B,
output [3:0]AND_OUT,
output [3:0]OR_OUT,
output [3:0]XOR_OUT,
output [3:0]XNOR_OUT
);
assign AND_OUT = {A & B};
assign OR_OUT = {A | B};
assign XOR_OUT = {A ^ B};
assign XNOR_OUT = {~{A^B} };
endmodule