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

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

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