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

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

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