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

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

*GRAMMAR*
zup -> RED 
 kiki -> PURPLE 
 dax -> GREEN 
 fep -> YELLOW 
 u1 gazzer u2 -> [u2] [u1] 
 u1 blicket u2 -> [u1] [u2] 
 u1 tufa u2 -> [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 