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

*QUERY*
IN: tufa lug dax OUT: RED GREEN
IN: dax OUT: GREEN
IN: dax lug dax OUT: GREEN GREEN
IN: wif blicket dax dax OUT: GREEN GREEN PURPLE
IN: wif dax lug wif OUT: PURPLE GREEN PURPLE
IN: wif lug fep zup tufa fep OUT: PURPLE YELLOW RED YELLOW
IN: dax lug wif OUT: GREEN PURPLE
IN: fep zup wif tufa OUT: YELLOW PURPLE RED
IN: fep tufa lug wif OUT: YELLOW RED PURPLE
IN: dax blicket wif OUT: PURPLE GREEN

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