H,W = map(int,input().split())
G = [input() for _ in range(H)]

ans = [[G[i][j] for j in range(W)] for i in range(H)]
l = [(0,1),(0,-1),(1,0),(-1,0)]
for i in range(H):
	for j in range(W):
		if ans[i][j] != ".":
			s = set()
			stack = [(i,j)]
			s.add((i,j))
			a = ans[i][j]
			while stack:
				x,y = stack.pop()
				for xx,yy in l:
					if 0 <= x + xx < H and 0 <= y + yy < W:
						if (x + xx,y + yy) not in s and ans[x + xx][y + yy] == a:
							s.add((x + xx,y + yy))
							stack.append((x + xx,y + yy))
			if len(s) > 3:
				for x,y in s:
					ans[x][y] = "."
for l in ans:
	print("".join(l))