from collections import defaultdict
N=int(input())
S=[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 d["A"]==N-1 and d["."]==1:ans+=1

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

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

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

print(ans)