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

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

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