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

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

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