*SUPPORT*
IN: lug tufa OUT: RED RED
IN: gazzer zup dax OUT: GREEN PURPLE
IN: gazzer gazzer gazzer tufa zup wif OUT: GREEN GREEN GREEN GREEN BLUE
IN: dax gazzer tufa OUT: PURPLE GREEN GREEN
IN: gazzer lug wif OUT: GREEN RED BLUE
IN: gazzer lug tufa OUT: GREEN RED RED
IN: lug lug zup lug zup dax OUT: RED RED RED PURPLE
IN: wif tufa OUT: BLUE BLUE
IN: dax zup lug OUT: PURPLE RED
IN: gazzer OUT: GREEN
IN: gazzer fep lug OUT: GREEN RED
IN: dax tufa zup gazzer OUT: PURPLE PURPLE GREEN
IN: dax OUT: PURPLE
IN: lug dax fep lug OUT: RED PURPLE RED

*QUERY*
IN: wif lug fep lug OUT: BLUE RED RED
IN: gazzer fep gazzer OUT: GREEN GREEN
IN: lug lug dax dax tufa zup lug OUT: RED RED PURPLE PURPLE PURPLE RED
IN: lug fep lug zup dax OUT: RED RED PURPLE
IN: wif tufa zup lug OUT: BLUE BLUE RED
IN: lug fep wif OUT: RED BLUE
IN: lug OUT: RED
IN: wif gazzer lug tufa OUT: BLUE GREEN RED RED
IN: gazzer tufa OUT: GREEN GREEN
IN: gazzer zup wif OUT: GREEN BLUE

*GRAMMAR*
lug -> RED 
 gazzer -> GREEN 
 dax -> PURPLE 
 wif -> BLUE 
 u1 fep u2 -> [u1] [u2] 
 x1 zup u1 -> [x1] [u1] 
 u1 tufa -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 