#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int N,M; cin >> N >> M;
    vector<vector<int>> A(N, vector<int>(N, 0));
    rep(_,M) {
        int a,b; cin >> a >> b;
        A[a][b] = A[b][a] = 1;
    }

    int ans = 0;
    rep(a,N)rep(b,a)rep(c,b)rep(d,c) {
        vector<int> v = {a, b, c, d};
        vector<int> deg(4, 0);
        rep(i,4)rep(j,4) deg[i] += A[v[i]][v[j]];
        int ok = 1;
        rep(i,4) ok &= deg[i] == 2;
        if(ok) ans++;
    }
    cout << ans << endl;
}