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

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

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