#include <iostream>
#include <vector>
using namespace std;
struct l{
  int x,y;
};
int main(){
  int n,m;cin>>n>>m;
  vector<l> A(m);
  for(int i = 0; m > i; i++){
    cin>>A[i].x>>A[i].y;
  }
  int ans = 0;
  for(int i = 0; n > i; i++){
    for(int j = i+1; n > j; j++){
      for(int k = j+1; n > k; k++){
        for(int l = k+1; n > l; l++){
          int mp[4];
          for(int i = 0; 4 > i ;i++){
            mp[i] = 0;
          }
          for(int x = 0; m > x; x++){
            if((A[x].x == i || A[x].x == j || A[x].x == k || A[x].x == l) && (A[x].y == i || A[x].y == j || A[x].y == k || A[x].y == l)){
              mp[0] += (A[x].x == i) + (A[x].y == i);
              mp[1] += (A[x].x == j) + (A[x].y == j);
              mp[2] += (A[x].x == k) + (A[x].y == k);
              mp[3] += (A[x].x == l) + (A[x].y == l);
            }
          }
          if(mp[0] == 2 && mp[0]  == mp[1] && mp[1] == mp[2] && mp[2] == mp[3]){
            ans++;
          }
        }
      }
    }
  }
  cout << ans << endl;
}