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

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

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