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

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

*GRAMMAR*
gazzer -> BLUE 
 zup -> PURPLE 
 dax -> GREEN 
 fep -> YELLOW 
 x1 wif x2 -> [x1] [x2] [x2] 
 u1 lug u2 -> [u2] [u1] 
 u1 tufa x1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 