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

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

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