import sys
sys.setrecursionlimit(1 << 20)
H,W = map(int, input().split())
A = [ list(input()) for _ in range(H) ]

dx = [0,1]
dy = [1,0]
global ans
ans = 0

def dfs(sx,sy,cnt):
    global ans
    if sx==H-1 and sy==W-1:
        #print(ans)
        ans += 1
        return
    for x,y in zip(dx,dy):
        if not (0<=sx+x<=H-1):
            continue
        if not (0<=sy+y<=W-1):
            continue
        if A[sx+x][sy+y]=="#":
            continue
        if A[sx+x][sy+y]=="x" and cnt==0:
            continue
        if A[sx+x][sy+y]=="x":
            dfs(sx+x,sy+y,cnt-1)
        if A[sx+x][sy+y]=="o":
            dfs(sx+x,sy+y,cnt+1)
dfs(0,0,1)
print(ans)