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

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

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