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

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

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