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

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

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