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

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

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