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

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

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