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

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

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