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

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

*GRAMMAR*
fep -> GREEN 
 lug -> RED 
 wif -> YELLOW 
 dax -> BLUE 
 x1 zup -> [x1] [x1] [x1] [x1] 
 u1 gazzer -> [u1] [u1] [u1] [u1] 
 x1 tufa x2 -> [x1] [x2] [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 