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

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

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