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

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

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