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

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

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