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

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

*GRAMMAR*
tufa -> GREEN 
 lug -> BLUE 
 wif -> PINK 
 fep -> YELLOW 
 x1 dax x2 -> [x1] [x1] [x2] 
 x1 zup -> [x1] [x1] 
 x1 gazzer -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 