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

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

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