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

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

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