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

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

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