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

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

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