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

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

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