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

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

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