*SUPPORT*
IN: wif gazzer wif fep OUT: YELLOW YELLOW YELLOW YELLOW
IN: zup wif OUT: PURPLE YELLOW
IN: lug OUT: GREEN
IN: lug gazzer wif tufa kiki gazzer lug OUT: YELLOW GREEN GREEN RED
IN: zup lug wif fep OUT: PURPLE GREEN YELLOW PURPLE GREEN YELLOW
IN: lug gazzer lug tufa zup gazzer lug fep OUT: GREEN GREEN GREEN PURPLE GREEN PURPLE
IN: zup gazzer wif OUT: YELLOW PURPLE
IN: wif gazzer wif OUT: YELLOW YELLOW
IN: kiki OUT: RED
IN: kiki kiki zup gazzer kiki OUT: RED RED RED PURPLE
IN: lug kiki gazzer kiki OUT: GREEN RED RED
IN: lug gazzer zup OUT: PURPLE GREEN
IN: zup OUT: PURPLE
IN: zup gazzer lug OUT: GREEN PURPLE

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

*GRAMMAR*
lug -> GREEN 
 zup -> PURPLE 
 wif -> YELLOW 
 kiki -> RED 
 u1 gazzer u2 -> [u2] [u1] 
 x1 tufa x2 -> [x1] [x2] 
 x1 fep -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 