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

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

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