module mux3 #(parameter WIDTH=8) (a, b, c, select, out);
  // select | out
  // 00 | a
  // 01 | b
  // 02 | c
  input [1:0] select;
  input[WIDTH-1:0] a,b,c;
  output [WIDTH-1:0]out;
  reg out;
  always @(select or a or b or c)
  if (select ==2'b00) out = a;
  else if (select == 2'b01) out = b;
  else if (select == 2'b10) out = c;
endmodule