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

*QUERY*
IN: tufa fep tufa OUT: GREEN GREEN
IN: tufa lug blicket wif OUT: GREEN PURPLE PINK
IN: wif blicket dax OUT: RED PURPLE
IN: lug OUT: PINK
IN: dax OUT: RED
IN: tufa tufa blicket tufa OUT: GREEN GREEN GREEN
IN: wif fep lug OUT: PURPLE PINK
IN: tufa blicket lug OUT: PINK GREEN
IN: dax blicket tufa OUT: GREEN RED
IN: tufa kiki wif blicket dax kiki dax dax OUT: GREEN RED PURPLE RED RED

*GRAMMAR*
lug -> PINK 
 dax -> RED 
 wif -> PURPLE 
 tufa -> GREEN 
 u1 fep u2 -> [u1] [u2] 
 x1 kiki x2 -> [x1] [x2] 
 u1 blicket u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 