/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Main
{
    
    
    public static void main (String[] args) throws java.lang.Exception
    {
        // your code goes here
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] lines = br.readLine().split(" ");
        int N = Integer.parseInt(lines[0]);
        int M = Integer.parseInt(lines[1]);
        
        int[][] nodeMap = new int[N][N];
        int a,b;
        for(int i=0;i<M;i++){
            lines = br.readLine().split(" ");
            a = Math.min(Integer.parseInt(lines[0]),Integer.parseInt(lines[1]));
            b = Math.max(Integer.parseInt(lines[0]),Integer.parseInt(lines[1]));
            nodeMap[a][b] = 1;
        }
        
        int ans = 0;
        for(int i=0;i<N;i++){
            for(int j=i+1;j<N;j++){
                for(int k=j+1;k<N;k++){
                    for(int l=k+1;l<N;l++){
                        ans += check(nodeMap,i,j,k,l);
                    }
                }
            }
        }
        System.out.println(ans);
    }
    
    private static int check(int[][] nodeMap,int i,int j,int k,int l){
        if(nodeMap[i][j] == 1
        && nodeMap[i][k] == 0
        && nodeMap[i][l] == 1
        && nodeMap[j][k] == 1
        && nodeMap[j][l] == 0
        && nodeMap[k][l] == 1){
            return 1;
        }
        if(nodeMap[i][j] == 0
        && nodeMap[i][k] == 1
        && nodeMap[i][l] == 1
        && nodeMap[j][k] == 1
        && nodeMap[j][l] == 1
        && nodeMap[k][l] == 0){
            return 1;
        }
        if(nodeMap[i][j] == 1
        && nodeMap[i][k] == 1
        && nodeMap[i][l] == 0
        && nodeMap[j][k] == 0
        && nodeMap[j][l] == 1
        && nodeMap[k][l] == 1){
            return 1;
        }
        return 0;
    }
    
}