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

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

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