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

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

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