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

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

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