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

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

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