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

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

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