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

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

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