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

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

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