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

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

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