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

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

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