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

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

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