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

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

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