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

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

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