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

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

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