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

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

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