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

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

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