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

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

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