*SUPPORT*
IN: fep kiki OUT: BLUE PINK
IN: dax blicket kiki OUT: PINK GREEN
IN: wif OUT: RED
IN: dax tufa fep OUT: BLUE GREEN
IN: wif tufa kiki OUT: PINK RED
IN: dax dax OUT: GREEN GREEN
IN: dax OUT: GREEN
IN: kiki tufa kiki OUT: PINK PINK
IN: dax tufa dax OUT: GREEN GREEN
IN: fep gazzer dax dax tufa fep OUT: BLUE GREEN BLUE GREEN
IN: kiki blicket kiki OUT: PINK PINK
IN: fep fep kiki blicket fep OUT: BLUE BLUE BLUE PINK
IN: wif wif tufa kiki OUT: RED PINK RED
IN: wif blicket wif OUT: RED RED

*QUERY*
IN: fep tufa fep OUT: BLUE BLUE
IN: dax gazzer fep blicket dax OUT: GREEN GREEN BLUE
IN: fep OUT: BLUE
IN: kiki dax gazzer kiki tufa dax OUT: PINK GREEN GREEN PINK
IN: wif gazzer wif OUT: RED RED
IN: fep blicket wif OUT: RED BLUE
IN: fep fep OUT: BLUE BLUE
IN: dax blicket wif OUT: RED GREEN
IN: kiki OUT: PINK
IN: dax kiki OUT: GREEN PINK

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