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

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

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