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

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

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