*SUPPORT*
IN: dax tufa kiki lug OUT: RED GREEN RED GREEN
IN: wif lug lug OUT: BLUE BLUE BLUE BLUE
IN: dax gazzer kiki OUT: RED RED GREEN
IN: kiki lug OUT: GREEN GREEN
IN: fep tufa dax lug OUT: YELLOW RED YELLOW RED
IN: fep tufa wif OUT: YELLOW BLUE
IN: dax kiki lug OUT: RED GREEN RED GREEN
IN: fep wif lug OUT: YELLOW BLUE YELLOW BLUE
IN: wif tufa fep OUT: BLUE YELLOW
IN: kiki OUT: GREEN
IN: fep OUT: YELLOW
IN: fep wif OUT: YELLOW BLUE
IN: kiki tufa fep OUT: GREEN YELLOW
IN: kiki dax tufa dax OUT: GREEN RED RED

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

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