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

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

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