entity DECODE is
port 
(A,B,ENbar : in bit;
Y : out bit_vector(3 downto 0));
end DECODE;
architecture LGATES of DECODE is
begin
Y(0) <= ENbar or (not A nand not B);
Y(1) <= ENbar or (A nand not B);
Y(2) <= ENbar or (not A nand B);
Y(3) <= ENbar or (A nand B);
end LGATES;

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