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

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

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