*SUPPORT*
IN: fep fep blicket lug wif fep OUT: RED YELLOW RED RED RED YELLOW RED
IN: tufa blicket fep OUT: RED BLUE
IN: tufa wif fep OUT: BLUE RED BLUE
IN: lug zup blicket tufa OUT: YELLOW BLUE PURPLE
IN: lug gazzer tufa blicket zup OUT: YELLOW YELLOW PURPLE BLUE
IN: tufa blicket zup gazzer zup blicket fep OUT: PURPLE BLUE PURPLE BLUE RED PURPLE
IN: tufa blicket zup OUT: PURPLE BLUE
IN: lug blicket zup OUT: PURPLE YELLOW
IN: lug blicket lug OUT: YELLOW YELLOW
IN: fep zup blicket lug OUT: RED YELLOW PURPLE
IN: lug blicket fep OUT: RED YELLOW
IN: fep blicket tufa OUT: BLUE RED
IN: tufa zup OUT: BLUE PURPLE
IN: zup fep OUT: PURPLE RED

*QUERY*
IN: zup wif tufa OUT: PURPLE BLUE PURPLE
IN: lug OUT: YELLOW
IN: lug blicket tufa OUT: BLUE YELLOW
IN: tufa blicket lug OUT: YELLOW BLUE
IN: fep lug blicket tufa wif lug OUT: RED BLUE YELLOW YELLOW RED BLUE YELLOW
IN: fep OUT: RED
IN: zup zup OUT: PURPLE PURPLE
IN: tufa OUT: BLUE
IN: zup lug blicket fep gazzer lug tufa OUT: PURPLE RED YELLOW PURPLE RED YELLOW YELLOW BLUE
IN: zup OUT: PURPLE

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