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

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

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