*SUPPORT*
IN: wif gazzer wif OUT: RED RED
IN: zup OUT: PURPLE
IN: dax zup OUT: BLUE PURPLE
IN: zup gazzer zup OUT: PURPLE PURPLE
IN: dax OUT: BLUE
IN: dax gazzer tufa OUT: GREEN BLUE
IN: zup zup lug wif OUT: PURPLE PURPLE RED
IN: zup gazzer tufa OUT: GREEN PURPLE
IN: tufa kiki tufa OUT: GREEN GREEN GREEN
IN: tufa OUT: GREEN
IN: dax gazzer zup OUT: PURPLE BLUE
IN: zup dax kiki wif OUT: PURPLE BLUE RED RED
IN: zup kiki zup OUT: PURPLE PURPLE PURPLE
IN: tufa dax kiki zup OUT: GREEN BLUE PURPLE PURPLE

*QUERY*
IN: tufa lug dax OUT: GREEN BLUE
IN: zup lug wif OUT: PURPLE RED
IN: dax lug zup OUT: BLUE PURPLE
IN: dax wif dax lug zup OUT: BLUE RED BLUE PURPLE
IN: wif wif gazzer wif OUT: RED RED RED
IN: zup tufa lug tufa OUT: PURPLE GREEN GREEN
IN: wif kiki wif OUT: RED RED RED
IN: wif OUT: RED
IN: tufa gazzer tufa OUT: GREEN GREEN
IN: wif kiki dax OUT: RED BLUE BLUE

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