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

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

*GRAMMAR*
dax -> YELLOW 
 tufa -> GREEN 
 lug -> RED 
 fep -> BLUE 
 x1 wif x2 -> [x1] [x2] 
 u1 zup u2 -> [u2] [u1] [u1] 
 u1 blicket -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 