import sys
sys.setrecursionlimit(1000000)
h, w = map(int, input().split())
grid = []
for _ in range(h):
    line = list(input())
    grid.append(line)
minimum_count = 100
ans = 0

def dfs(i, j, stone, visited):
    # print(i, j)
    if i < 0 or i >= h or j < 0 or j >= w:
        return
    global minimum_count, ans
    visited[i][j] = True
    if grid[i][j] == "o":
        stone += 1
    if grid[i][j] == "x":
        stone -= 1
    if stone < 0:
        return
    if i == h-1 and j == w-1:
        ans += 1
        return
    for dx, dy in [[0, 1], [1, 0]]:
        if i+dx < 0 or i+dx >= h or j+dy < 0 or j+dy >= w:
            continue
        if grid[i+dx][j+dy] == "#":
            continue
        else:
            dfs(i+dx, j+dy, stone, visited.copy())

dfs(0, 0, 0, [[False]*w for _ in range(h)])
print(ans)