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

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

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