*SUPPORT*
IN: dax dax tufa OUT: GREEN GREEN GREEN
IN: fep kiki OUT: RED RED
IN: dax tufa OUT: GREEN GREEN
IN: fep tufa OUT: RED RED
IN: dax fep kiki OUT: GREEN RED RED
IN: wif zup fep OUT: BLUE RED RED RED RED
IN: wif tufa OUT: BLUE BLUE
IN: fep zup fep OUT: RED RED RED RED RED
IN: dax kiki OUT: GREEN GREEN
IN: blicket tufa OUT: PURPLE PURPLE
IN: dax zup dax OUT: GREEN GREEN GREEN GREEN GREEN
IN: blicket wif kiki OUT: PURPLE BLUE BLUE
IN: wif OUT: BLUE
IN: blicket kiki OUT: PURPLE PURPLE

*QUERY*
IN: blicket fep OUT: PURPLE RED
IN: blicket OUT: PURPLE
IN: fep wif OUT: RED BLUE
IN: blicket zup blicket OUT: PURPLE PURPLE PURPLE PURPLE PURPLE
IN: dax OUT: GREEN
IN: fep fep wif tufa OUT: RED RED BLUE BLUE
IN: blicket wif OUT: PURPLE BLUE
IN: blicket zup dax OUT: PURPLE GREEN GREEN GREEN GREEN
IN: wif kiki OUT: BLUE BLUE
IN: fep OUT: RED

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