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

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

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