You are an expert Verilog hardware designer working on a complete FPGA or ASIC project. You are given the full source code of a Verilog project. One of the modules in the project is incomplete — its implementation is missing and marked with:

// >>> Module Implementation Begin

// <<< Module Implementation End

Your task is to complete the missing implementation so that the entire project functions correctly. You must infer what the missing module or logic is supposed to do by analyzing the rest of the codebase: module names, signal connections, instantiations, comments, and usage patterns.

Follow these rules:

1. Only generate Verilog code to go between the `// >>> Module Implementation Begin` and `// <<< Module Implementation End` comments.
2. Use Verilog-2001 syntax. Ensure the code is synthesizable.
3. Assume the goal is a working, integrated hardware design — your code must make the whole system function as intended.
4. Analyze the naming, I/O ports, and how the module is instantiated or used in other parts of the project.
5. Implement correct behavior based on design context. Do not guess randomly — reason it out.
6. Avoid vendor-specific features unless explicitly required.
7. Do not output comments, explanation, or anything outside the required code region unless explicitly asked.

Your output should contain **only the Verilog code** that fits inside the marked region.

/*
 * Copyright (c) 2024 Your Name
 * SPDX-License-Identifier: Apache-2.0
 */

`default_nettype none

module tt_um_resfuzzy (
    input  wire [7:0] ui_in,    // Dedicated inputs
    output wire [7:0] uo_out,   // Dedicated outputs
    input  wire [7:0] uio_in,   // IOs: Input path
    output wire [7:0] uio_out,  // IOs: Output path
    output wire [7:0] uio_oe,   // IOs: Enable path (active high: 0=input, 1=output)
    input  wire       ena,      // always 1 when the design is powered, so you can ignore it
    input  wire       clk,      // clock
    input  wire       rst_n     // reset_n - low to reset
);

  // All output pins must be assigned. If not used, assign to 0.
  // assign uo_out  = ui_in + uio_in;  // Example: ou_out is the sum of ui_in and uio_in
    //assign uio_in[7:1]=7'b0000000;
  assign uio_out = 0;
  assign uio_oe  = 0;

  // List all unused inputs to prevent warnings
  wire _unused = &{ena, 1'b0};

  top top(   
      .clk(clk),
      .rst_n(rst_n),
      .ss(uio_in[0]),
      .data_bus(ui_in),     
      .risk(uo_out)          
    );  


endmodule


module top(   
    input  clk,rst_n,ss,
    input wire [7:0] data_bus,     
    output wire [7:0] risk          
    );
// >>> Module Implementation Begin

// <<< Module Implementation End
endmodule





module controller(
    input  clk,rst_n,
    input wire [7:0] data_bus,    
    input ss,
    output  ef1,
    output reg [7:0]s1,
    output reg [7:0]s2
    );
    
    reg [7:0]r1;
    reg [7:0]r2;
    reg [1:0]count;
    reg efr;
 

    always @(posedge clk) begin    
        if(!rst_n)begin
            r1<=0;
            r2<=0;
            count =2'b00;
        end
        else begin
            
            case(ss)
                1'b0:begin
                     r1 <= data_bus ;  
                     count = count+2'b01;

                     end
                1'b1:begin
                     r2 <= data_bus;
                     count = count+2'b01;

                     end
            endcase
            
            if(count == 2'b10)begin
                if (r1 !=0 && r2!=0)begin
                    efr=1;
                    s1=r1;
                    s2= r2;       
                end
                  count =0; 
            end else begin
                efr=0;  
                count = count;          
            end
        end 
    
    end
   assign ef1 = efr;
   
endmodule


module fuzzy(
    input  clk,rst_n,ef,
    input wire [7:0] raw,     
    input wire [7:0] sow, 
    output reg [7:0] risk           
);
  
    wire [7:0] rain_low;
    wire [7:0] rain_medium;
    wire [7:0] rain_high;
    
    wire [7:0] soil_moisture_low;
    wire [7:0] soil_moisture_medium;
    wire [7:0] soil_moisture_high;
    
    wire [7:0] rule1_firing_strength;
    wire [7:0] rule2_firing_strength;
    wire [7:0] rule3_firing_strength;
    
    wire [15:0] numerator;
    wire [7:0] denominator;



    function [7:0] triangular_membership;
        input [7:0] value;
        input [7:0] a;
        input [7:0] b;
        input [7:0] c;
        begin
            if (value <= a)
                triangular_membership = 0;
            else if (value <= b)
                triangular_membership = (((value - a)<<8)-(value - a))/ (b - a);  
            else if (value <= c)
                triangular_membership = (((c - value)<<8)-(c - value)) / (c - b);
            else
                triangular_membership = 0;
        end
    endfunction
    
        assign rain_low = triangular_membership(raw, 0, 20, 40);
        assign rain_medium = triangular_membership(raw, 30, 50, 70);
        assign rain_high = triangular_membership(raw, 60, 80, 100);
        
        assign soil_moisture_low = triangular_membership(sow, 0, 20, 40);
        assign soil_moisture_medium = triangular_membership(sow, 30, 50, 70);
        assign soil_moisture_high = triangular_membership(sow, 60, 80, 100);
        
        assign  rule1_firing_strength = rain_high & soil_moisture_high;
        assign  rule2_firing_strength = rain_medium & soil_moisture_medium;
        assign  rule3_firing_strength = rain_low & soil_moisture_low;
        
        assign numerator = ((rule1_firing_strength <<8)-(rule1_firing_strength)) + rule2_firing_strength * 170 + rule3_firing_strength * 85;
        assign denominator = rule1_firing_strength + rule2_firing_strength + rule3_firing_strength;

    always @(posedge clk ) begin
       
        if (!rst_n)begin
             risk <= 8'b0;       
        end
        else if (ef) begin
            risk<= (denominator != 0) ? numerator / denominator :8'b0;
        end 
     end    
endmodule


Reference solution:
rtl/generated.v:   
  wire [7:0]ra;
  wire [7:0]so;
  wire efw;
  
 controller controller (
        .clk(clk),
        .rst_n(rst_n),
        .data_bus(data_bus),
        .ss(ss),
        .ef1(efw),
        .s1(ra),
        .s2(so)
    );    

fuzzy fuzzy(
    .clk(clk),
    .rst_n(rst_n),
    .ef(efw),
    .raw(ra),
    .sow(so),
    .risk(risk)           
    );