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

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

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