module oh_oai22 #(parameter DW = 1 ) // array width
   (
    input [DW-1:0]  a0,
    input [DW-1:0]  a1,
    input [DW-1:0]  b0,
    input [DW-1:0]  b1, 
    output [DW-1:0] z
    );
   
   assign z = ~((a0 | a1) & (b0 | b1));
   
endmodule