import sys from collections import defaultdict input = sys.stdin.readline n = int(input()) users = [input()[:-1] for _ in [0] * n] di = defaultdict(int) for s in users: for i in range(len(s)): t = ''.join([s[:i], '.', s[i+1:]]) di[t] += 1 for s in users: ans = 0 for i in range(len(s)): t = ''.join([s[:i], '.', s[i+1:]]) ans += di[t] - 1 print(ans)