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

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

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