import sys, time, random
from collections import deque, Counter, defaultdict
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 61 - 1
mod = 998244353

h, w = mi()

s = [input() for _ in range(h)]

def check(start, l):
    reachable = [[False] * w for _ in range(h)]
    visit = [[False] * w for _ in range(h)]
    reachable[0][start] = True
    visit[0][start] = True
    for i in range(h - 1):
        wall = deque()
        bwall = -1
        for j in range(w):
            if s[i][j] == '#':
                wall.append(j)
        wall.append(w)
        for j in range(w):
            if s[i][j] == '#':
                bwall = j
                wall.popleft()
            if not reachable[i][j]:
                continue
            if s[i + 1][j] == '.':
                reachable[i + 1][j] = True
            for k in range(max(0, bwall + 1, j - l), j + 1):
                if visit[i][k]:
                    break
                visit[i][k] = True
                if s[i + 1][k] == '.':
                    reachable[i + 1][k] = True
            for k in range(min(w, wall[0], j + l + 1) - 1, j, -1):
                if visit[i][k]:
                    break
                visit[i][k] = True
                if s[i + 1][k] == '.':
                    reachable[i + 1][k] = True
    if any(reachable[-1]):
        return True
            
    return False

for i in range(w):
    ok = w + 1
    ng = -1
    while abs(ok - ng) > 1:
        mid = (ok + ng) // 2
        if check(i, mid):
            ok = mid
        else:
            ng = mid
    print(ok)