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

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

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