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

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

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