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

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

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