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

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

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