from collections import deque
import sys
input = sys.stdin.readline
H, W = map(int, input().split())
G = [list(input().strip()) for _ in range(H)]
dir = [(1, 0), (0, 1), (-1, 0), (0, -1)]
for i in range(H):
    for j in range(W):
        if G[i][j]==".":
            continue
        deq = deque()
        deq.append((i, j))
        seen = set()
        seen.add((i, j))
        while deq:
            ci, cj = deq.popleft()
            for di, dj in dir:
                ni = ci+di
                nj = cj+dj
                if 0<=ni<H and 0<=nj<W:
                    if G[ci][cj]==G[ni][nj] and (ni, nj) not in seen:
                        deq.append((ni, nj))
                        seen.add((ni, nj))
        if len(seen)>=4:
            for ci, cj in seen:
                G[ci][cj] = "."
for i in range(H):
    print("".join(G[i]))