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

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

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