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

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

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