h, w = [int(x) for x in input().split()]
a = [input() for _ in range(h)]

cnt = [[[0] * 30 for _ in range(w)] for _ in range(h)]
cnt[0][0][1] = 1

for i in range(h):
	for j in range(w):
		for k in range(25):
			if i < h - 1:
				if a[i+1][j] == "o":
					cnt[i+1][j][k+1] += cnt[i][j][k]
				elif a[i+1][j] == "x" and k > 0:
					cnt[i+1][j][k-1] += cnt[i][j][k]
					
			if j < w - 1:
				if a[i][j+1] == "o":
					cnt[i][j+1][k+1] += cnt[i][j][k]
				elif a[i][j+1] == "x" and k > 0:
					cnt[i][j+1][k-1] += cnt[i][j][k]
					
print(sum(cnt[h-1][w-1]))