n=int(input()) ss=[] d={} B=1007 M=1000000007 for i in range(n): s=input() h=0 for j in range(len(s)): h+=ord(s[j])*(B**j) h%=M if h not in d: d[h]=0 d[h]+=1 ss+=[s] for i in range(n): s=ss[i] h=0 for j in range(len(s)): h+=ord(s[j])*(B**j) h%=M c=0 for j in range(len(s)): h-=ord(s[j])*(B**j) for k in range(26): h+=(k+ord("a"))*(B**j) h%=M if h in d: c+=d[h]*(chr(k+ord("a"))!=s[j]) h-=(k+ord("a"))*(B**j) h+=ord(s[j])*(B**j) print(c)