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

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

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