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

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

*GRAMMAR*
zup -> YELLOW 
 dax -> BLUE 
 fep -> RED 
 kiki -> PURPLE 
 u1 wif u2 -> [u2] [u1] 
 x1 gazzer x2 -> [x1] [x1] [x2] [x2] 
 u1 tufa u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 