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

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

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