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

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

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