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

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

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