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

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

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