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

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

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