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

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

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