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

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

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