*SUPPORT*
IN: wif blicket wif OUT: YELLOW YELLOW
IN: zup tufa wif OUT: YELLOW RED
IN: lug zup dax tufa lug OUT: GREEN RED GREEN PURPLE
IN: zup zup blicket lug OUT: RED RED GREEN
IN: dax OUT: PURPLE
IN: lug blicket lug OUT: GREEN GREEN
IN: zup OUT: RED
IN: dax blicket dax OUT: PURPLE PURPLE
IN: dax tufa zup OUT: RED PURPLE
IN: wif OUT: YELLOW
IN: lug lug lug zup OUT: GREEN GREEN GREEN RED
IN: lug OUT: GREEN
IN: zup kiki OUT: RED RED
IN: lug kiki OUT: GREEN GREEN

*QUERY*
IN: wif kiki OUT: YELLOW YELLOW
IN: lug tufa zup OUT: RED GREEN
IN: wif dax zup tufa wif OUT: YELLOW PURPLE YELLOW RED
IN: lug blicket zup OUT: GREEN RED
IN: lug blicket dax OUT: GREEN PURPLE
IN: zup blicket dax OUT: RED PURPLE
IN: dax blicket lug OUT: PURPLE GREEN
IN: wif tufa zup OUT: RED YELLOW
IN: dax dax blicket zup OUT: PURPLE PURPLE RED
IN: dax kiki OUT: PURPLE PURPLE

*GRAMMAR*
dax -> PURPLE 
 zup -> RED 
 wif -> YELLOW 
 lug -> GREEN 
 u1 tufa u2 -> [u2] [u1] 
 u1 kiki -> [u1] [u1] 
 u1 blicket u2 -> [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 