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

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

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