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

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

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