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

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

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