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

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

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