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

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

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