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

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

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