*SUPPORT*
IN: zup blicket dax OUT: RED GREEN
IN: wif kiki fep tufa OUT: PURPLE PURPLE YELLOW
IN: tufa blicket zup OUT: GREEN YELLOW
IN: tufa wif kiki fep zup tufa kiki OUT: YELLOW PURPLE PURPLE GREEN YELLOW YELLOW
IN: dax blicket tufa OUT: YELLOW RED
IN: dax kiki fep tufa OUT: RED RED YELLOW
IN: dax wif OUT: RED PURPLE
IN: dax wif tufa blicket dax OUT: RED PURPLE RED YELLOW
IN: dax OUT: RED
IN: zup dax OUT: GREEN RED
IN: dax kiki OUT: RED RED
IN: tufa kiki OUT: YELLOW YELLOW
IN: tufa OUT: YELLOW
IN: wif blicket tufa OUT: YELLOW PURPLE

*QUERY*
IN: wif zup fep tufa fep zup OUT: PURPLE GREEN YELLOW GREEN
IN: dax zup kiki OUT: RED GREEN GREEN
IN: tufa wif kiki OUT: YELLOW PURPLE PURPLE
IN: wif blicket wif OUT: PURPLE PURPLE
IN: zup kiki OUT: GREEN GREEN
IN: tufa zup blicket zup fep wif OUT: YELLOW GREEN GREEN PURPLE
IN: dax blicket zup OUT: GREEN RED
IN: wif kiki OUT: PURPLE PURPLE
IN: zup blicket tufa OUT: YELLOW GREEN
IN: wif OUT: PURPLE

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