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

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

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