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

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

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