#pragma GCC optimize("O3", "unroll-loops")
#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt")
#include <bits/stdc++.h>
#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define ff first
#define ss second
#define dbg(x) cerr << #x << " = " << x << '\n'
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vvi = vt< vt<int> >;
const int N = 1e6 + 5, mod = 1e9 + 7, inf = 1e18 + 7, B = 500, LIM = (1ll << 60);
const double eps = 1e-6;
vt<int> g[20], used(20);
bool ok;
void dfs (int v, int s, int c, int f, bool check = 0) {
used[v] = 1;
if (v == f) {
ok |= check;
return;
}
if (ok) return;
if (v == c) check = 1;
for (auto to: g[v]) {
if (!used[to]) {
dfs(to, s, c, f, check);
used[to] = 0;
}
}
}
void solve () {
int n, m;
cin >> n >> m;
for (int i = 1; i <= m; i++) {
int x, y;
cin >> x >> y;
g[x].pb(y);
g[y].pb(x);
}
int ans = 0;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
for (int k = 1; k <= n; k++) {
if (i == j || i == k || j == k) continue;
ok = 0;
fill(all(used), 0);
dfs(i, i, j, k);
if (ok) ans++;
}
}
}
cout << ans;
cout << '\n';
}
bool testcases = 0;
signed main() {
cin.tie(0) -> sync_with_stdio(0);
int test = 1;
if (testcases) cin >> test;
for (int cs = 1; cs <= test; cs++) {
solve();
}
}
