*SUPPORT*
IN: wif kiki wif OUT: BLUE BLUE
IN: tufa tufa kiki dax OUT: RED GREEN RED
IN: tufa blicket gazzer OUT: RED YELLOW YELLOW YELLOW YELLOW
IN: wif kiki dax OUT: GREEN BLUE
IN: dax blicket gazzer OUT: GREEN YELLOW YELLOW YELLOW YELLOW
IN: wif lug blicket OUT: YELLOW BLUE
IN: wif OUT: BLUE
IN: dax lug wif OUT: BLUE GREEN
IN: dax blicket blicket lug wif OUT: GREEN YELLOW BLUE YELLOW
IN: tufa OUT: RED
IN: tufa kiki wif OUT: BLUE RED
IN: wif lug tufa OUT: RED BLUE
IN: blicket OUT: YELLOW
IN: wif wif lug wif OUT: BLUE BLUE BLUE

*QUERY*
IN: wif wif lug dax OUT: BLUE GREEN BLUE
IN: blicket gazzer OUT: YELLOW YELLOW YELLOW YELLOW
IN: wif tufa gazzer OUT: BLUE RED RED RED RED
IN: dax dax gazzer OUT: GREEN GREEN GREEN GREEN GREEN
IN: blicket kiki dax OUT: GREEN YELLOW
IN: tufa gazzer OUT: RED RED RED RED
IN: wif gazzer OUT: BLUE BLUE BLUE BLUE
IN: wif wif wif tufa OUT: BLUE BLUE BLUE RED
IN: tufa lug dax OUT: GREEN RED
IN: dax lug dax OUT: GREEN GREEN

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