library IEEE;
use IEEE.STD_LOGIC_1164.ALL;



entity demultiplekser is
    Port ( wej : in   STD_LOGIC_vector(1 downto 0);
           wyj : out  STD_LOGIC_vector(3 downto 0));
end demultiplekser;

architecture Behavioral of demultiplekser is

begin
with wej select
wyj <= "1110" when "00",
         "1101" when "01",
         "1011" when "10",
         "0111" when others;

end Behavioral;