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

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

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