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

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

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