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

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

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