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

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

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