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

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

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