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

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

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