import sys input = lambda: sys.stdin.readline().rstrip() ii = lambda: int(input()) mi = lambda: map(int, input().split()) li = lambda: list(mi()) INF = 2 ** 63 - 1 mod = 998244353 import string S = string.ascii_lowercase n = ii() s = [input() for _ in range(n)] se = set(s) for v in s: ans = set() for i in range(len(v)): for u in S: to = v[:i] + u + v[i + 1:] if to in se: ans.add(to) ans.discard(v) print(len(ans))