*SUPPORT*
IN: zup zup dax gazzer OUT: RED BLUE RED
IN: wif dax wif OUT: GREEN GREEN
IN: wif kiki blicket zup kiki gazzer OUT: GREEN PURPLE RED BLUE
IN: zup fep blicket OUT: PURPLE PURPLE RED
IN: gazzer wif kiki blicket OUT: BLUE GREEN PURPLE
IN: zup kiki gazzer kiki blicket kiki wif OUT: RED BLUE PURPLE GREEN
IN: zup dax wif OUT: GREEN RED
IN: gazzer dax gazzer fep wif dax zup OUT: RED GREEN RED GREEN BLUE BLUE
IN: gazzer dax blicket OUT: PURPLE BLUE
IN: zup wif blicket OUT: RED GREEN PURPLE
IN: blicket kiki wif OUT: PURPLE GREEN
IN: gazzer OUT: BLUE
IN: blicket dax blicket OUT: PURPLE PURPLE
IN: wif dax blicket OUT: PURPLE GREEN

*QUERY*
IN: wif OUT: GREEN
IN: gazzer dax gazzer OUT: BLUE BLUE
IN: wif dax zup OUT: RED GREEN
IN: wif wif OUT: GREEN GREEN
IN: zup wif OUT: RED GREEN
IN: wif kiki wif dax zup OUT: GREEN RED GREEN
IN: zup OUT: RED
IN: gazzer dax gazzer fep wif OUT: GREEN GREEN BLUE BLUE
IN: blicket kiki gazzer blicket OUT: PURPLE BLUE PURPLE
IN: blicket OUT: PURPLE

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