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

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

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