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

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

*GRAMMAR*
tufa -> GREEN 
 kiki -> YELLOW 
 fep -> BLUE 
 wif -> PURPLE 
 x1 blicket x2 -> [x2] [x1] [x2] 
 u1 zup u2 -> [u2] [u1] 
 x1 gazzer x2 -> [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 