*SUPPORT*
IN: dax zup OUT: RED PINK
IN: zup fep tufa lug tufa fep zup OUT: PINK GREEN GREEN PINK
IN: tufa wif kiki OUT: BLUE GREEN
IN: dax wif dax OUT: RED RED
IN: dax fep kiki OUT: RED BLUE
IN: kiki OUT: BLUE
IN: kiki wif kiki lug tufa fep kiki OUT: BLUE BLUE GREEN BLUE
IN: dax fep dax OUT: RED RED
IN: zup wif tufa OUT: GREEN PINK
IN: kiki fep tufa lug tufa lug zup OUT: BLUE GREEN GREEN PINK
IN: tufa wif tufa OUT: GREEN GREEN
IN: kiki fep dax OUT: BLUE RED
IN: tufa OUT: GREEN
IN: tufa zup OUT: GREEN PINK

*QUERY*
IN: dax OUT: RED
IN: zup dax wif zup lug tufa lug zup OUT: PINK PINK RED GREEN PINK
IN: dax zup lug kiki dax wif tufa OUT: RED PINK BLUE GREEN RED
IN: zup kiki fep kiki OUT: PINK BLUE BLUE
IN: zup fep dax OUT: PINK RED
IN: kiki wif dax OUT: RED BLUE
IN: kiki wif tufa OUT: GREEN BLUE
IN: kiki fep kiki OUT: BLUE BLUE
IN: zup fep zup OUT: PINK PINK
IN: tufa fep kiki lug kiki fep dax OUT: GREEN BLUE BLUE RED

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