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

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

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