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

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

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