Verilog Missing connection for port
module and22 (input i1,i2,i3,i4, output _and1,_and2); 
    assign _and1 = i1 &amp; i2;
    assign _and2 = i3 &amp; i4;
endmodule


module orInv2 (input _and1, _and2, output f); 
    assign f = !(_and1 | _and2);
endmodule


module aoi22 ( input i1, i2, i3, i4, output f);
    logic o_and1;
    logic o_and2;

    and22 _and22_1 ( .i1(i1), .i2(i2), .i3(i3), .i4(i4), ._and1(o_and1), ._and1(o_and2) );
    orInv2 _orInv2_2 ( ._and1(o_and1), ._and2(o_and2),.f(f) ); 
endmodule