How do you plan to solve it?
module sr_latch_enable ( input EN, input S, input R, output reg Q, output reg Qn ); always @(*) begin if (EN) begin if (R) begin Q <= 0; Qn <= 1; end else if (S) begin Q <= 1; Qn <= 0; end // else HOLD end // EN=0 → HOLD end endmodule