#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3RhsN1z ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e
signed main(){
_3RhsN1z;
int n;
cin>>n;
vec(string) a(n);
rep(i,n){
cin>>a[i];
}
std::map<string,int> mp;
rep(i,n){
string s=a[i];
vec(string) tmp;
rep(i,sz(s)){
string now="";
rng(j,i,sz(s)){
now+=s[j];
tmp.pb(now);
}
}
sort(tmp.begin(),tmp.end());
tmp.erase(unique(tmp.begin(),tmp.end()),tmp.end());
for(auto s:tmp){
mp[s]+=1;
}
}
int ans=0;
rep(i,n){
ans+=mp[a[i]]-1;
}
print(ans);
}
