N=int(input())
S=[input() for i in range(N)]
ans=0
for i in range(N):
  if S[i].count("A")==N-1:
    ans+=1
for i in range(N):
  arr=[]
  for j in range(N):
    arr.append(S[j][i])
  if arr.count("A")==N-1:
    ans+=1
arr=[]
for i in range(N):
  arr.append(S[i][i])
if arr.count("A")==N-1:
  ans+=1

arr=[]
for i in range(N):
  arr.append(S[i][N-i-1])
if arr.count("A")==N-1:
  ans+=1

print(ans)