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

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

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