*SUPPORT*
IN: dax lug dax dax tufa zup wif OUT: GREEN GREEN PURPLE PINK PURPLE PINK GREEN
IN: wif fep zup fep OUT: PURPLE YELLOW YELLOW YELLOW YELLOW
IN: fep OUT: YELLOW
IN: fep kiki OUT: YELLOW YELLOW YELLOW
IN: tufa kiki OUT: PINK PINK PINK
IN: wif kiki OUT: PURPLE PURPLE PURPLE
IN: wif OUT: PURPLE
IN: wif zup fep OUT: YELLOW PURPLE YELLOW PURPLE
IN: fep zup wif lug tufa zup wif OUT: PURPLE PINK PURPLE PINK PURPLE YELLOW PURPLE YELLOW
IN: dax lug fep zup wif OUT: PURPLE YELLOW PURPLE YELLOW GREEN
IN: tufa OUT: PINK
IN: fep tufa tufa OUT: YELLOW PINK PINK
IN: wif dax wif zup wif OUT: PURPLE GREEN PURPLE PURPLE PURPLE PURPLE
IN: dax lug dax zup wif OUT: PURPLE GREEN PURPLE GREEN GREEN

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

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