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

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

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