n = int(input()) s = [input() for _ in range(n)] strings = set() anagrams = {} for i in s: sortedString = ''.join(sorted(i)) if (sortedString in strings): try: anagrams[sortedString] += 1 except KeyError: anagrams[sortedString] = 1 else: strings.add(sortedString) ans = 0 for i in anagrams.values(): ans += (i * (i+1)) // 2 print(ans) n = int(input()) s = [input() for _ in range(n)] sortedS = [] for i in s: sortedS.append(''.join(sorted(i))) setS = set(sortedS) ans = 0 for i in setS: anagramCounts = sortedS.count(i) ans += (anagramCounts * (anagramCounts - 1)) // 2 print(ans)