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

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

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