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

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

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