from collections import defaultdict as dfd n=int(input()) d=dfd(int) user=[] for _ in [0]*n: s=input() user.append(s) for i in range(len(s)): t="".join([s[:i],".",s[(i+1):]]) d[t]+=1 for s in user: ans=0 for i in range(len(s)): t="".join([s[:i],".",s[(i+1):]]) ans+=d[t]-1 print(ans)