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

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

*GRAMMAR*
kiki -> GREEN 
 gazzer -> YELLOW 
 fep -> RED 
 tufa -> BLUE 
 x1 wif x2 -> [x1] [x2] 
 x1 zup -> [x1] [x1] 
 u1 dax u2 -> [u2] [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 