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

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

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