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

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

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