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

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

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