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

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

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