h, w = [ int(v) for v in input().split() ]

sky = [ list(input()) for i in range(h)]
star_list = []

for i in range(h):
	for j in range(w):
		if sky[i][j] == "*":
			star_list.append((i,j))

def surface(y,x):
	global star_list
	star_1 = (star_list[0][0] - y, star_list[0][1] - x)
	star_2 = (star_list[1][0] - y, star_list[1][1] - x)
	s = star_2[0] * star_1[1] - star_1[0] * star_2[1]
	
	return s

for i in [(0,0),(0,1),(1,0)]:
	if surface(i[0],i[1]) != 0:
		sky[i[0]][i[1]] = "*"
		break

for i in range(h):
	print("".join(sky[i]))