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

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

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