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

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

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