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

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

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