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

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

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