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

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

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