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

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

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