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

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

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