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

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

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