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

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

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