Consider the following sub$\_$module$\_$verilog code:

module sub$-$module$-$verilog $($input $A,B,$ output wire $M,N,S)$

Assign M=AB;

AssignN=A&$B$;

Assign $S=A$&$B$;

endmodule

Consider the following main$\_$module$\_$verilog code:

module main$-$module$-$verilog$($input wire $[2$:$0]A,B,$

output wire $x,Y,Z$;

wire $s0,51,52,s3,s4,s5,s6,s7,s8$;

sub$-$module$-$verilog eq$\_$bito $(.A(A[0]),.B(B[0]),.M(s0),$

$.N(s1),.S(s2))$;

sub$-$module$-$verilog eq$\_$bit$1(.$A$($A$[1]),.$B$($B$[1]),.$M$($s$3),$

$.N(s4),.S(s5)$;

sub$-$module$-$verilog eq$\_$bit$2(.$A$($A$[2]),.$B$($B$[2]),.$M$($s$6),$

$.N(s7),.s(s8)$;

assign $x=50$ & $53$ & $56$ ;

assign $Y=57|(56$&$54)|(56$&$53$&$s1)$;

assign $Z=s8|(56$&$s5)|(56$&$53$&$s2)$;

endimodule

The module described above represents