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

*QUERY*
IN: fep tufa OUT: YELLOW YELLOW
IN: wif tufa OUT: BLUE BLUE
IN: gazzer wif kiki OUT: RED BLUE BLUE BLUE
IN: wif fep fep kiki OUT: BLUE YELLOW YELLOW YELLOW YELLOW
IN: fep kiki OUT: YELLOW YELLOW YELLOW
IN: gazzer tufa OUT: RED RED
IN: fep OUT: YELLOW
IN: gazzer kiki OUT: RED RED RED
IN: fep lug wif OUT: BLUE YELLOW
IN: gazzer OUT: RED

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