*SUPPORT*
IN: wif lug fep OUT: YELLOW BLUE
IN: zup lug wif OUT: RED YELLOW
IN: wif OUT: YELLOW
IN: dax fep OUT: PURPLE BLUE
IN: zup lug fep OUT: RED BLUE
IN: dax lug dax kiki zup lug fep tufa OUT: RED BLUE PURPLE PURPLE RED BLUE PURPLE PURPLE
IN: zup dax tufa OUT: RED PURPLE RED PURPLE
IN: zup lug zup OUT: RED RED
IN: dax wif lug dax OUT: PURPLE YELLOW PURPLE
IN: zup OUT: RED
IN: dax lug wif OUT: PURPLE YELLOW
IN: dax lug zup tufa tufa OUT: PURPLE RED PURPLE RED PURPLE RED PURPLE RED
IN: dax zup OUT: PURPLE RED
IN: fep wif tufa OUT: BLUE YELLOW BLUE YELLOW

*QUERY*
IN: fep lug dax OUT: BLUE PURPLE
IN: wif kiki zup wif lug fep kiki zup OUT: RED RED YELLOW BLUE YELLOW
IN: fep dax dax tufa OUT: BLUE PURPLE PURPLE BLUE PURPLE PURPLE
IN: dax lug dax OUT: PURPLE PURPLE
IN: dax OUT: PURPLE
IN: dax lug fep OUT: PURPLE BLUE
IN: zup lug wif tufa tufa OUT: RED YELLOW RED YELLOW RED YELLOW RED YELLOW
IN: dax zup dax dax OUT: PURPLE RED PURPLE PURPLE
IN: fep OUT: BLUE
IN: fep lug wif tufa OUT: BLUE YELLOW BLUE YELLOW

*GRAMMAR*
wif -> YELLOW 
 fep -> BLUE 
 dax -> PURPLE 
 zup -> RED 
 x1 tufa -> [x1] [x1] 
 u1 lug u2 -> [u1] [u2] 
 x1 kiki x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 