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

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

*GRAMMAR*
tufa -> RED 
 dax -> YELLOW 
 wif -> BLUE 
 gazzer -> GREEN 
 u1 lug u2 -> [u2] [u1] 
 u1 fep x1 -> [x1] [u1] 
 x1 kiki x2 -> [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 