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

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

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