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

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

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