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

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

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