*SUPPORT*
IN: tufa OUT: RED
IN: wif fep tufa OUT: BLUE RED
IN: dax wif kiki OUT: PINK BLUE PINK BLUE PINK BLUE
IN: tufa zup tufa OUT: RED RED RED RED
IN: wif fep lug zup tufa OUT: BLUE PURPLE RED RED RED
IN: tufa lug OUT: RED PURPLE
IN: wif wif OUT: BLUE BLUE
IN: lug dax dax OUT: PURPLE PINK PINK
IN: wif zup wif OUT: BLUE BLUE BLUE BLUE
IN: dax wif zup wif OUT: PINK BLUE BLUE BLUE BLUE
IN: dax fep tufa OUT: PINK RED
IN: wif zup lug OUT: BLUE PURPLE PURPLE PURPLE
IN: lug kiki OUT: PURPLE PURPLE PURPLE
IN: dax OUT: PINK

*QUERY*
IN: wif dax OUT: BLUE PINK
IN: tufa fep wif fep wif OUT: RED BLUE BLUE
IN: tufa zup dax OUT: RED PINK PINK PINK
IN: lug fep lug zup tufa OUT: PURPLE PURPLE RED RED RED
IN: tufa fep tufa OUT: RED RED
IN: lug fep dax OUT: PURPLE PINK
IN: tufa fep wif OUT: RED BLUE
IN: lug zup wif OUT: PURPLE BLUE BLUE BLUE
IN: lug OUT: PURPLE
IN: wif tufa OUT: BLUE RED

*GRAMMAR*
dax -> PINK 
 lug -> PURPLE 
 tufa -> RED 
 wif -> BLUE 
 u1 zup u2 -> [u1] [u2] [u2] [u2] 
 x1 kiki -> [x1] [x1] [x1] 
 u1 fep x1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 