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

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

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