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

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

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