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

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

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