*SUPPORT*
IN: dax dax OUT: GREEN GREEN
IN: zup kiki fep blicket dax OUT: GREEN BLUE PURPLE
IN: dax OUT: GREEN
IN: fep dax OUT: PURPLE GREEN
IN: zup blicket fep OUT: PURPLE BLUE
IN: dax wif fep OUT: GREEN PURPLE
IN: zup wif zup blicket zup wif dax OUT: BLUE BLUE BLUE GREEN
IN: fep blicket zup blicket fep OUT: PURPLE BLUE PURPLE
IN: lug OUT: PINK
IN: zup zup OUT: BLUE BLUE
IN: zup fep blicket dax wif fep blicket zup OUT: BLUE GREEN BLUE PURPLE PURPLE
IN: lug zup OUT: PINK BLUE
IN: dax wif zup wif zup OUT: GREEN BLUE BLUE
IN: lug dax wif lug OUT: PINK GREEN PINK

*QUERY*
IN: dax lug dax OUT: GREEN PINK GREEN
IN: zup OUT: BLUE
IN: fep OUT: PURPLE
IN: lug wif fep OUT: PINK PURPLE
IN: dax kiki dax OUT: GREEN GREEN
IN: dax dax zup kiki zup dax blicket fep OUT: PURPLE GREEN GREEN BLUE BLUE GREEN
IN: fep wif lug OUT: PURPLE PINK
IN: dax wif lug OUT: GREEN PINK
IN: zup blicket dax OUT: GREEN BLUE
IN: dax dax wif lug wif dax OUT: GREEN GREEN PINK GREEN

*GRAMMAR*
fep -> PURPLE 
 lug -> PINK 
 dax -> GREEN 
 zup -> BLUE 
 x1 blicket u1 -> [u1] [x1] 
 x1 wif u1 -> [x1] [u1] 
 x1 kiki x2 -> [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 