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

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

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