INT = lambda : int(input())
MI = lambda : map(int, input().split())
MI_DEC = lambda : map(lambda x : int(x)-1, input().split())
LI = lambda : list(map(int, input().split()))
LI_DEC = lambda : list(map(lambda x : int(x)-1, input().split()))
INF = float('inf')
CEIL = lambda a, b : (a + b - 1) // b

N = INT()
S = [input() for i in range(N)]

ans = 0
for i in range(N):
    an, dn = 0, 0
    for j in range(N):
        if S[i][j] == 'A':
            an += 1

        elif S[i][j] == '.':
            dn += 1

    if an == N-1 and dn == 1:
        ans += 1


for j in range(N):
    an, dn = 0, 0
    for i in range(N):
        if S[i][j] == 'A':
            an += 1

        elif S[i][j] == '.':
            dn += 1

    if an == N-1 and dn == 1:
        ans += 1


an, dn = 0, 0
for i in range(N):
    if S[i][i] == 'A':
        an += 1

    elif S[i][i] == '.':
        dn += 1

if an == N-1 and dn == 1:
    ans += 1


an, dn = 0, 0
for i in range(N):
    if S[i][N-1-i] == 'A':
        an += 1

    elif S[i][N-1-i] == '.':
        dn += 1

if an == N-1 and dn == 1:
    ans += 1


print(ans)