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

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

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