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

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

*GRAMMAR*
dax -> PURPLE 
 fep -> RED 
 tufa -> YELLOW 
 lug -> GREEN 
 x1 zup x2 -> [x2] [x1] 
 u1 wif -> [u1] [u1] 
 u1 gazzer u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 