#include "bits/stdc++.h"
using namespace std;
#define intt long long
#define fi first
#define se second
const intt mxN = 20000+1;
const intt LG = 20;
const intt inf = 1e18;
const intt mod = 1e9 + 7;
intt dx[4] = {1, -1, 0ll, 0ll};
intt dy[4] = {0, 0, 1, -1};
map<string,intt> mp;
vector<string> v;
intt n;
void _() {
cin >> n;
for(intt i = 0; i < n; i++) {
string s;
cin >> s;
v.push_back(s);
set<string> st;
for(intt l = 0; l < s.size(); l++) {
string cur = "";
for(intt r = l; r < s.size(); r++) {
cur += s[r];
st.insert(cur);
}
}
for(auto u : st) mp[u]++;
}
intt ans = -n;
for(intt i = 0; i < n; i++) {
ans += mp[v[i]];
}
cout << ans << endl;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
// freopen("island.in", "r", stdin);
// freopen("island.out", "w", stdout);
intt t = 1, buu = 1;
// cin >> t;
while(t--){
// cout << "Case #" << buu++ << ": ";
_();
}
}
