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

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

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