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

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

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