*SUPPORT*
IN: zup tufa wif OUT: GREEN YELLOW
IN: kiki OUT: BLUE
IN: kiki zup blicket OUT: BLUE YELLOW YELLOW
IN: wif kiki OUT: GREEN BLUE
IN: zup kiki kiki gazzer OUT: YELLOW BLUE BLUE BLUE BLUE
IN: wif tufa kiki OUT: BLUE GREEN
IN: wif gazzer OUT: GREEN GREEN GREEN
IN: zup gazzer OUT: YELLOW YELLOW YELLOW
IN: wif fep OUT: GREEN RED
IN: kiki tufa kiki OUT: BLUE BLUE
IN: fep blicket OUT: RED RED
IN: wif OUT: GREEN
IN: fep gazzer OUT: RED RED RED
IN: fep wif tufa fep OUT: RED RED GREEN

*QUERY*
IN: fep wif OUT: RED GREEN
IN: zup fep gazzer OUT: YELLOW RED RED RED
IN: wif tufa fep OUT: RED GREEN
IN: kiki gazzer OUT: BLUE BLUE BLUE
IN: kiki fep tufa zup OUT: BLUE YELLOW RED
IN: kiki wif gazzer OUT: BLUE GREEN GREEN GREEN
IN: fep tufa fep OUT: RED RED
IN: fep OUT: RED
IN: fep tufa wif OUT: GREEN RED
IN: wif wif wif gazzer OUT: GREEN GREEN GREEN GREEN GREEN

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