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

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

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