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

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

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