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

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

*GRAMMAR*
wif -> PURPLE 
 lug -> GREEN 
 zup -> YELLOW 
 gazzer -> RED 
 u1 kiki u2 -> [u1] [u2] 
 x1 dax x2 -> [x2] [x1] 
 x1 fep -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 