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

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

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