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

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

*GRAMMAR*
wif -> BLUE 
 lug -> YELLOW 
 fep -> GREEN 
 dax -> RED 
 x1 tufa x2 -> [x1] [x2] 
 x1 blicket -> [x1] [x1] 
 x1 kiki -> [x1] [x1] [x1] [x1] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 