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

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

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