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

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

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