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

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

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