from collections import defaultdict

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

ans = 0

for i in range(N):
    D = defaultdict(int)
    for j in range(N):
        D[S[i][j]] += 1
    if "A" in D and D["A"] == N-1 and "." in D and D["."] == 1:
        ans += 1

for j in range(N):
    D = defaultdict(int)
    for i in range(N):
        D[S[i][j]] += 1
    if "A" in D and D["A"] == N-1 and "." in D and D["."] == 1:
        ans += 1

D = defaultdict(int)
for i in range(N):
    D[S[i][i]] += 1
if "A" in D and D["A"] == N-1 and "." in D and D["."] == 1:
    ans += 1

D = defaultdict(int)
for i in range(N):
    D[S[i][N-i-1]] += 1
if "A" in D and D["A"] == N-1 and "." in D and D["."] == 1:
    ans += 1

print(ans)