*SUPPORT*
IN: fep OUT: YELLOW
IN: wif OUT: PINK
IN: dax lug fep lug tufa OUT: RED YELLOW GREEN
IN: wif blicket wif OUT: PINK PINK
IN: fep blicket wif OUT: PINK YELLOW
IN: fep blicket dax OUT: GREEN YELLOW
IN: dax blicket dax OUT: GREEN GREEN
IN: tufa tufa lug wif OUT: PINK RED RED
IN: tufa wif OUT: RED PINK
IN: dax blicket tufa OUT: RED GREEN
IN: fep zup zup OUT: YELLOW YELLOW YELLOW YELLOW
IN: tufa blicket tufa lug dax zup OUT: GREEN RED RED GREEN RED RED
IN: wif lug tufa OUT: RED PINK
IN: dax blicket fep lug wif zup OUT: PINK YELLOW GREEN PINK YELLOW GREEN

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

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