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

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

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