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

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

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