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

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

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