*SUPPORT*
IN: tufa blicket kiki OUT: PURPLE GREEN
IN: fep OUT: BLUE
IN: zup dax OUT: RED RED
IN: kiki OUT: PURPLE
IN: kiki fep dax OUT: PURPLE BLUE BLUE
IN: fep dax OUT: BLUE BLUE
IN: zup blicket zup OUT: RED RED
IN: kiki zup dax OUT: PURPLE RED RED
IN: fep blicket zup OUT: RED BLUE
IN: fep gazzer zup OUT: RED BLUE
IN: tufa OUT: GREEN
IN: fep blicket fep OUT: BLUE BLUE
IN: kiki blicket zup OUT: RED PURPLE
IN: kiki dax OUT: PURPLE PURPLE

*QUERY*
IN: tufa dax OUT: GREEN GREEN
IN: kiki tufa fep dax OUT: PURPLE GREEN BLUE BLUE
IN: kiki dax gazzer tufa dax OUT: GREEN GREEN PURPLE PURPLE
IN: kiki blicket tufa OUT: GREEN PURPLE
IN: fep gazzer kiki dax OUT: PURPLE PURPLE BLUE
IN: tufa tufa OUT: GREEN GREEN
IN: fep blicket tufa OUT: GREEN BLUE
IN: fep tufa dax OUT: BLUE GREEN GREEN
IN: tufa blicket fep OUT: BLUE GREEN
IN: zup gazzer kiki blicket zup OUT: RED PURPLE RED

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