def f(n, grid):
    ans = 0
    for row in grid:
        if row.count('A') == n-1 and row.count('.') == 1:
            ans += 1
    for col in range(n):
        col_val = [grid[row][col] for row in range(n)]
        if col_val.count('A') == n-1 and col_val.count('.') == 1:
            ans += 1
    naname1 = [grid[i][i] for i in range(n)]
    if naname1.count('A') == n-1 and naname1.count('.') == 1:
        ans += 1
    naname2 = [grid[i][n-1-i] for i in range(n)]
    if naname2.count('A') == n-1 and naname2.count('.') == 1:
        ans += 1
    return ans
n=int(input())
grid=[input() for _ in range(n)]
print(f(n, grid))