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

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

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