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

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

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