# competetive programming
# 競プロにつかえるもの

# sys関連
import sys
#sys.setrecursionlimit(100000000)
if sys.version_info.minor >= 11:
    # python3.11以上でのみ4300桁制限がかかる
    sys.set_int_max_str_digits(10000000)

input = lambda: sys.stdin.readline()[:-1]

### import関連
## もしpypyなら
#import pypyjit; pypyjit.set_param('max_unroll_recursion=-1')  # 再帰関数の展開をする
#from atcoder.dsu import DSU  # UnionFind　使い方：uf=DSU(頂点数) ; uf.merge(u, v) ; uf.same(u, v) ; uf.leader(u) ; uf.size(u) ; uf.groups()
#from atcoder.scc import SCCGraph # SCC 使い方：g=SCCGraph(頂点数) ; g.add_edge(u, v) ; scc=g.scc()
#from atcoder.segtree import SegTree # セグ木 使い方：tree=SegTree(関数, 単位元, 元リスト) ; tree.set(pos, x) ; tree.prod(left, right + 1) # 閉区間
#import heapq # Priority Queue 使い方：q=[...] ; heapq.heapify(q) ; heapq.heappush(q, item) ; heapq.heappop(q, item)
from collections import deque  # Queue 使い方：q=deque(lis) ; q.popleft(item) ; q.append(item)
#from collections import Counter # Counter
#from collections import defaultdict # defaultdict delに注意
#from itertools import accumulate # 累積和
#from itertools import combinations # 組み合わせ
#from bisect import bisect_left, bisect_right # 二分探索
#from decimal import Decimal, getcontext; getcontext().prec = 100 # 正確な少数

### 定数関連
#inf = float("inf")
#inf = 10**18
#mod = 998244353
#mod = 1000000007 # 10**9+7
di = ((0, 1), (1, 0))#, (1, 1), (1, -1), (-1, 1), (-1, -1)) # 8近傍 4まで回せば4近傍

INTIN = lambda: int(input())
def MAPIN(kansu=int):
    return map(kansu, input().split())
LISTIN = lambda k=int: list(MAPIN(k))

h, w = MAPIN()
mas = [input() for i in range(h)]

bfs = deque([(0, 0, 1)])
ans = 0

while bfs:
	nx, ny, njewel = bfs.popleft()
	if nx == h-1 and ny == w-1:
		ans += 1
		continue
	for dx, dy in di:
		px, py = nx+dx, ny+dy
		if px >= h or py >= w:
			continue
		if mas[px][py] == "#":
			continue
		if mas[px][py] == "o":
			bfs.append((px, py, njewel+1))
		else:
			if njewel == 0:
				continue
			bfs.append((px, py, njewel-1))

print(ans)