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

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

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