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

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

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