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

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

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