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

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

*GRAMMAR*
blicket -> YELLOW 
 gazzer -> GREEN 
 fep -> RED 
 wif -> BLUE 
 u1 dax u2 -> [u2] [u1] 
 u1 zup u2 -> [u2] [u1] 
 x1 tufa x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 