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

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

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