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

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

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