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

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

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