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

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

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