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

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

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