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

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

*GRAMMAR*
zup -> GREEN 
 dax -> RED 
 fep -> PINK 
 tufa -> BLUE 
 u1 blicket u2 -> [u1] [u2] [u1] 
 u1 wif u2 -> [u2] [u1] [u2] 
 x1 gazzer x2 -> [x1] [x2] [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 