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

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

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