*SUPPORT*
IN: wif dax fep kiki OUT: GREEN RED BLUE
IN: wif tufa wif fep zup OUT: RED PINK RED
IN: wif tufa kiki OUT: RED GREEN
IN: dax tufa dax kiki zup lug zup OUT: BLUE BLUE GREEN PINK PINK
IN: dax dax lug dax OUT: BLUE BLUE BLUE
IN: zup tufa zup lug zup fep kiki OUT: PINK GREEN PINK PINK
IN: zup lug dax fep kiki fep kiki OUT: GREEN GREEN BLUE PINK
IN: wif lug zup fep dax OUT: BLUE PINK RED
IN: kiki OUT: GREEN
IN: kiki fep zup OUT: PINK GREEN
IN: wif dax kiki lug dax fep kiki OUT: GREEN RED BLUE BLUE GREEN
IN: dax OUT: BLUE
IN: wif lug wif OUT: RED RED
IN: zup lug wif OUT: RED PINK

*QUERY*
IN: wif lug kiki OUT: GREEN RED
IN: zup lug kiki OUT: GREEN PINK
IN: zup lug zup OUT: PINK PINK
IN: wif zup OUT: RED PINK
IN: wif OUT: RED
IN: kiki dax fep wif fep wif OUT: RED RED GREEN BLUE
IN: zup kiki lug kiki OUT: PINK GREEN GREEN
IN: dax kiki tufa kiki OUT: BLUE GREEN GREEN
IN: wif lug dax OUT: BLUE RED
IN: wif zup kiki OUT: RED PINK GREEN

*GRAMMAR*
kiki -> GREEN 
 wif -> RED 
 dax -> BLUE 
 zup -> PINK 
 u1 tufa x1 -> [u1] [x1] 
 x1 fep u1 -> [u1] [x1] 
 u1 lug u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 