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

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

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