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

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

*GRAMMAR*
tufa -> YELLOW 
 zup -> GREEN 
 kiki -> PURPLE 
 fep -> BLUE 
 x1 lug x2 -> [x1] [x1] [x1] [x2] [x1] 
 x1 wif u1 -> [x1] [u1] [u1] 
 x1 dax -> [x1] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 