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

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

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