Consider the following sub$\_$module$\_$ver$1$log code:

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

Assign $K=A-{?}^{{?}^{{?}^{?}}}B$;

Assign $N=A$&$B$;

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 $50,51,52,53,34,$$$5,s6,s7,s8$;

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

$+s(si),.s(s2)$;

sub$-$module$-$verilog eq bit$1(.,$

$.1(34),\mathrm{.}5(55),$

sub$-$nodule$-$verilog eq bit$2(.$ A $($A$[2]),,$ B$($B$[2]),.K(s6),$

$+N(87),+S(s8)$

assignx$=s0$ & $s3$ & $567$

endinsduze

The module described above represents