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

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

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