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

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

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