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

*QUERY*
IN: wif wif lug OUT: GREEN GREEN GREEN
IN: dax tufa dax OUT: BLUE BLUE BLUE
IN: fep lug OUT: YELLOW YELLOW
IN: dax lug OUT: BLUE BLUE
IN: blicket OUT: RED
IN: fep OUT: YELLOW
IN: blicket dax lug OUT: RED BLUE BLUE
IN: wif lug OUT: GREEN GREEN
IN: wif tufa fep OUT: YELLOW GREEN GREEN
IN: wif OUT: GREEN

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