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

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

*GRAMMAR*
lug -> BLUE 
 zup -> GREEN 
 gazzer -> YELLOW 
 dax -> RED 
 u1 wif -> [u1] [u1] 
 x1 tufa x2 -> [x2] [x1] 
 u1 fep u2 -> [u1] [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 