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

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

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