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

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

*GRAMMAR*
dax -> GREEN 
 wif -> YELLOW 
 blicket -> BLUE 
 fep -> RED 
 u1 zup u2 -> [u2] [u1] [u2] [u2] 
 x1 lug x2 -> [x2] [x1] 
 x1 tufa x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 