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

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

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