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

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

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