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

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

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