N = int(input())
S = []
for i in range(N):
    s = list(input())
    for j in range(N):
        if s[j] == "A":
            s[j] = 1
        elif s[j] == "B":
            s[j] = 0
        else:
            s[j] = -1
    S.append(s)
    
ans = 0

def check(S):
    v = 0
    for i in range(N):
        t = 0
        for j in range(N):
            t += S[i][j]
        v += t == N
        
        t = 0
        for j in range(N):
            t += S[j][i]
        v += t == N
        
    t = 0
    for i in range(N):
        t += S[i][i]
    v += t == N
    
    t = 0
    for i in range(N):
        t += S[N - 1 - i][i]
    v += t == N
    
    return v
        

for i in range(N):
    for j in range(N):
        if S[i][j] != -1:
            continue
        S[i][j] = 1
        ans += check(S)
        S[i][j] = -1
        
print(ans)