import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**8)

def dfs(y, x, cnt):
    if A[y][x] == "o":
        cnt += 1
    if A[y][x] == "x":
        cnt -= 1
    if A[y][x] == "#":
        cnt = -float("INF")
    if cnt < 0: return
    if y == H - 1 and x == W - 1:
        global ans
        ans += 1
    
    if y != H - 1:
        dfs(y + 1, x, cnt)
    if x != W - 1:
        dfs(y, x + 1, cnt)

H, W = map(int, input().split())
A = [list(input()[:-1]) for _ in range(H)]

ans = 0

dfs(0, 0, 0)

print(ans)