*SUPPORT*
IN: kiki kiki OUT: PINK PINK
IN: kiki OUT: PINK
IN: wif wif OUT: YELLOW YELLOW
IN: dax wif lug wif OUT: GREEN YELLOW YELLOW
IN: kiki wif kiki dax lug tufa OUT: PINK YELLOW PINK GREEN RED
IN: tufa kiki OUT: RED PINK
IN: tufa lug wif OUT: RED YELLOW
IN: kiki lug tufa lug kiki OUT: PINK RED PINK
IN: tufa kiki lug tufa OUT: RED PINK RED
IN: dax OUT: GREEN
IN: wif gazzer wif wif OUT: YELLOW YELLOW YELLOW YELLOW
IN: tufa OUT: RED
IN: wif tufa OUT: YELLOW RED
IN: dax lug dax OUT: GREEN GREEN

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

*GRAMMAR*
tufa -> RED 
 wif -> YELLOW 
 dax -> GREEN 
 kiki -> PINK 
 x1 fep x2 -> [x1] [x1] [x2] 
 x1 lug u1 -> [x1] [u1] 
 x1 gazzer x2 -> [x1] [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 