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

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

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