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

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

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