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

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

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