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

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

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