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

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

*GRAMMAR*
blicket -> GREEN 
 wif -> BLUE 
 zup -> RED 
 dax -> YELLOW 
 u1 fep x1 -> [u1] [x1] 
 x1 tufa x2 -> [x1] [x2] 
 x1 gazzer x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 