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

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

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