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

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

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