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

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

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