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

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

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