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

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

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