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

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

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