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

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

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