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

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

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