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

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

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