*SUPPORT*
IN: wif lug fep OUT: YELLOW GREEN
IN: fep wif OUT: GREEN YELLOW
IN: dax OUT: RED
IN: dax zup OUT: RED RED
IN: wif wif lug kiki OUT: YELLOW YELLOW BLUE
IN: fep gazzer OUT: GREEN GREEN GREEN GREEN
IN: kiki wif gazzer OUT: BLUE YELLOW YELLOW YELLOW YELLOW
IN: kiki OUT: BLUE
IN: wif lug kiki OUT: YELLOW BLUE
IN: dax wif gazzer OUT: RED YELLOW YELLOW YELLOW YELLOW
IN: dax gazzer OUT: RED RED RED RED
IN: fep wif zup OUT: GREEN YELLOW YELLOW
IN: fep lug fep OUT: GREEN GREEN
IN: kiki gazzer OUT: BLUE BLUE BLUE BLUE

*QUERY*
IN: wif zup OUT: YELLOW YELLOW
IN: kiki lug wif OUT: BLUE YELLOW
IN: fep kiki zup OUT: GREEN BLUE BLUE
IN: fep wif lug fep OUT: GREEN YELLOW GREEN
IN: wif lug dax OUT: YELLOW RED
IN: wif lug wif OUT: YELLOW YELLOW
IN: wif kiki zup OUT: YELLOW BLUE BLUE
IN: wif gazzer OUT: YELLOW YELLOW YELLOW YELLOW
IN: fep OUT: GREEN
IN: wif OUT: YELLOW

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