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

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

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