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

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

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