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

*QUERY*
IN: zup tufa dax OUT: BLUE GREEN
IN: dax tufa dax kiki OUT: BLUE BLUE BLUE BLUE BLUE BLUE
IN: dax tufa dax OUT: BLUE BLUE
IN: zup kiki OUT: GREEN GREEN GREEN
IN: dax tufa lug OUT: PURPLE BLUE
IN: dax dax OUT: BLUE BLUE
IN: zup OUT: GREEN
IN: wif lug tufa zup OUT: YELLOW GREEN PURPLE
IN: wif OUT: YELLOW
IN: wif fep OUT: YELLOW YELLOW YELLOW

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