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

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

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