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

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

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