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

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

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