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

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

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