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

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

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