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

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

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