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

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

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