H, W=map(int, input().split())
S=list(input() for i in range(H))

# dp[h][w][n] で h行w列で宝石をn個持っている場合の数
dp=[[[0 for k in range(109)] for j in range(W)] for i in range(H)]

dp[0][0][1]=1
ans=0
for h in range(H):
  for w in range(W):
    for n in range(109):
      for dh, dw in ((1,0),(0,1)):
        nh, nw=h+dh, w+dw
        if (nh<H and nw<W)==False: continue
        if S[nh][nw]=="o" and n+1<len(dp[nh][nw]):
          dp[nh][nw][n+1]+=dp[h][w][n]
        elif S[nh][nw]=="x":
          if n-1>=0:
          	dp[nh][nw][n-1]+=dp[h][w][n]

for n in range(1, len(dp[0][0])):
  ans+=dp[H-1][W-1][n]
print(ans)

# print(dp)