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

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

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