n = int(input()) s = [input() for _ in range(n)] p = set() for i in s: p.add(i) for i in range(n): ans = 0 for ind, j in enumerate(s[i]): t = [k for k in s[i]] for alpha in 'abcdefghijklmnopqrstuvwxyz': if j == alpha: continue t[ind] = alpha if "".join(t) in p: ans += 1 print(ans)