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

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

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