*SUPPORT*
IN: wif OUT: YELLOW
IN: wif zup tufa dax OUT: PINK YELLOW PINK YELLOW
IN: tufa OUT: PINK
IN: wif wif zup gazzer OUT: YELLOW BLUE YELLOW
IN: lug zup tufa OUT: PINK GREEN
IN: gazzer zup wif OUT: YELLOW BLUE
IN: lug fep fep OUT: GREEN GREEN GREEN GREEN
IN: wif fep OUT: YELLOW YELLOW
IN: lug dax OUT: GREEN GREEN
IN: lug zup gazzer OUT: BLUE GREEN
IN: lug OUT: GREEN
IN: lug tufa dax OUT: GREEN PINK GREEN PINK
IN: wif tufa lug zup tufa fep OUT: YELLOW PINK PINK GREEN YELLOW PINK PINK GREEN
IN: gazzer OUT: BLUE

*QUERY*
IN: lug zup lug OUT: GREEN GREEN
IN: lug lug dax fep OUT: GREEN GREEN GREEN GREEN GREEN GREEN GREEN GREEN
IN: gazzer zup gazzer OUT: BLUE BLUE
IN: wif wif dax dax OUT: YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW YELLOW
IN: lug zup wif OUT: YELLOW GREEN
IN: wif gazzer OUT: YELLOW BLUE
IN: tufa zup tufa OUT: PINK PINK
IN: tufa zup gazzer fep OUT: BLUE PINK BLUE PINK
IN: lug dax fep OUT: GREEN GREEN GREEN GREEN
IN: tufa gazzer OUT: PINK BLUE

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