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

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

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