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

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

*GRAMMAR*
zup -> PINK 
 tufa -> GREEN 
 wif -> RED 
 fep -> BLUE 
 u1 lug u2 -> [u2] [u1] [u1] [u1] 
 x1 gazzer x2 -> [x2] [x1] 
 x1 dax u1 -> [x1] [u1] 
 u1 x1 -> [u1] [x1] 
 