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

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

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