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

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

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