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

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

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