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

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

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