import collections,sys,math,functools,operator,itertools,bisect,heapq,decimal,string,time,random
#sys.setrecursionlimit(10**9)
#sys.set_int_max_str_digits(0)
#input = sys.stdin.readline
#n = int(input())
#alist = list(map(int,input().split()))
#alist = []
#s = input()
n = int(input())
grid = [list(input().rstrip()) for i in range(n)]
ans = 0
for i in range(n):
    cnt = 0
    d = 0
    for j in range(n):
        if grid[i][j] == 'A':
            cnt += 1
        elif grid[i][j] == '.':
            d += 1
    if cnt == n-1 and d == 1:
        ans += 1

for j in range(n):
    cnt = 0
    d = 0
    for i in range(n):
        if grid[i][j] == 'A':
            cnt += 1
        elif grid[i][j] == '.':
            d += 1
    if cnt == n-1 and d == 1:
        ans += 1

cnt = 0
d = 0
for i in range(n):
    if grid[i][i] == 'A':
        cnt += 1
    elif grid[i][i] == '.':
        d += 1
if cnt == n-1 and d == 1:
    ans += 1

cnt = 0
d = 0
for i in range(n):
    if grid[i][~i] == 'A':
        cnt += 1
    elif grid[i][~i] == '.':
        d += 1
if cnt == n-1 and d == 1:
    ans += 1

print(ans)