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

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

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