*SUPPORT*
IN: zup fep wif OUT: YELLOW BLUE
IN: zup OUT: BLUE
IN: gazzer lug lug fep lug OUT: RED PINK PINK PINK
IN: wif dax wif OUT: YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW
IN: lug fep zup OUT: BLUE PINK
IN: wif fep zup OUT: BLUE YELLOW
IN: gazzer fep gazzer OUT: RED RED
IN: gazzer dax gazzer OUT: RED RED RED RED RED RED
IN: lug OUT: PINK
IN: wif dax zup OUT: YELLOW YELLOW BLUE YELLOW BLUE YELLOW
IN: zup lug zup OUT: BLUE PINK BLUE
IN: gazzer OUT: RED
IN: zup fep gazzer OUT: RED BLUE
IN: zup fep zup OUT: BLUE BLUE

*QUERY*
IN: lug gazzer fep zup OUT: PINK BLUE RED
IN: wif lug zup tufa wif OUT: YELLOW PINK BLUE YELLOW PINK BLUE YELLOW
IN: zup fep lug OUT: PINK BLUE
IN: zup fep wif tufa zup fep gazzer OUT: YELLOW BLUE YELLOW BLUE RED BLUE
IN: gazzer gazzer OUT: RED RED
IN: lug fep gazzer OUT: RED PINK
IN: gazzer fep wif OUT: YELLOW RED
IN: wif wif OUT: YELLOW YELLOW
IN: zup dax lug OUT: BLUE BLUE PINK BLUE PINK BLUE
IN: wif OUT: YELLOW

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