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

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

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