N = int(input())
S = [input() for _ in range(N)]

ret = 0

for s in S:
    if s.count("A") == N - 1 and s.count(".") == 1:
        ret += 1

for i in range(N):
    c = [s[i] for s in S]
    if c.count("A") == N - 1 and c.count(".") == 1:
        ret += 1

c = [S[i][i] for i in range(N)]
if c.count("A") == N - 1 and c.count(".") == 1:
    ret += 1

c = [S[i][N - i - 1] for i in range(N)]
if c.count("A") == N - 1 and c.count(".") == 1:
    ret += 1

print(ret)