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

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

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