#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define pi M_PI
#define R cin>>
#define Z class
#define ll long long
#define ln cout<<'\n'
#define in(a) insert(a)
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define all(c) (c).begin(),(c).end()
#define iter(c) __typeof((c).begin())
#define rrep(i,n) for(int i=(int)(n)-1;i>=0;i--)
#define REP(i,m,n) for(int i=(int)(m);i<(int)(n);i++)
#define rep(i,n) REP(i,0,n)
#define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++)
template<Z A>void pr(A a){cout<<a;ln;}
template<Z A,Z B>void pr(A a,B b){cout<<a<<' ';pr(b);}
template<Z A,Z B,Z C>void pr(A a,B b,C c){cout<<a<<' ';pr(b,c);}
template<Z A,Z B,Z C,Z D>void pr(A a,B b,C c,D d){cout<<a<<' ';pr(b,c,d);}
template<Z A>void PR(A a,ll n){rep(i,n){if(i)cout<<' ';cout<<a[i];}ln;}
ll check(ll n,ll m,ll x,ll y){return x>=0&&x<n&&y>=0&&y<m;}
const ll MAX=1000000007,MAXL=1LL<<61,dx[4]={-1,0,1,0},dy[4]={0,1,0,-1};
typedef pair<int,int> P;

void Main() {
  ll n,m;
  cin >> n >> m;
  int d[n][n];
  rep(i,n) {
    rep(j,n) d[i][j]=MAX;
    d[i][i]=0;
  }
  rep(i,m) {
    int x,y;
    cin >> x >> y;
    d[x][y]=1;
    d[y][x]=1;
  }
  rep(k,n)rep(i,n)rep(j,n) d[i][j]=min(d[i][j],d[i][k]+d[k][j]);
  int ans=0;
  set<vector<int> > s;
  rep(i,n)rep(j,n)rep(k,n)rep(l,n) {
    set<int> se;
    se.in(i),se.in(j),se.in(k),se.in(l);
    if(se.size()!=4) continue;
    if(d[i][j]==1&&d[i][k]==2&&d[i][l]==1&&d[j][k]==1&&d[j][l]==2&&d[k][l]==1) {
      vector<int> v(4);v[0]=i,v[1]=j,v[2]=k,v[3]=l;
      sort(all(v));
      s.in(v);
    }
  }
  pr(s.size());
}

int main(){ios::sync_with_stdio(0);cin.tie(0);Main();return 0;}