N=int(input())
S=[input() for _ in range(N)]
ans=0
for h in range(N):
    if S[h].count("A")==N-1 and S[h].count(".")==1:ans+=1
for w in range(N):
    cntA=0
    cntD=0
    for h in range(N):
        if S[h][w]=="A":cntA+=1
        elif S[h][w]==".":cntD+=1
    if cntA==N-1 and cntD==1:ans+=1
cntA=0
cntD=0
for h in range(N):
    if S[h][h]=="A":cntA+=1
    elif S[h][h]==".":cntD+=1
if cntA==N-1 and cntD==1:ans+=1
cntA=0
cntD=0
for h in range(N):
    if S[h][N-1-h]=="A":cntA+=1
    elif S[h][N-1-h]==".":cntD+=1
if cntA==N-1 and cntD==1:ans+=1
print(ans)