module oh_oai31 #(parameter DW = 1 ) // array width
   (
    input [DW-1:0]  a0,
    input [DW-1:0]  a1,
    input [DW-1:0]  a2,
    input [DW-1:0]  b0, 
    output [DW-1:0] z
    );
   
   assign z = ~((a0 | a1 | a2) & b0);
   
endmodule