h, w = list(map(int, input().split()))
S = [input() for _ in range(h)]
A = [0] * w
for y in range(h):
    for x in range(w):
        if S[y][x] == "o":
            A[x] += 1

ans = 0
for y in range(h):
    f = 1
    if not "o" in S[y]:
        f = 0
    for x in range(w):
        if S[y][x] == "o" and A[x] > 1:
            f = 0
    ans += f
print(ans)