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

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

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