def list3(a, b, c, *, val=0):
    return [[[val] * c for _ in range(b)] for _ in range(a)]


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

dp = list3(H, W, 22, val=0)
dp[0][0][1] = 1

for i in range(H):
    for j in range(W):
        if A[i][j] == '#': continue
        for k in range(0, 21):
            if i-1 >= 0:
                x = k+1 if A[i][j] == 'o' else k-1
                dp[i][j][x] += dp[i-1][j][k]

            if j-1 >= 0:
                x = k+1 if A[i][j] == 'o' else k-1
                dp[i][j][x] += dp[i][j-1][k]

ans = sum(dp[H-1][W-1][i] for i in range(1, 21))
print(ans)