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

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

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