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

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

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