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

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

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