using namespace std;
#include<fstream>
#include<stdio.h>

struct nod{int vec;nod* next;};
typedef nod* list;
list a[4100],z[4100];
char viz[4100];
int niv[4100];

int sol=0;

void go(int x,int nv)
{
viz[x]=1;
niv[x]=nv;

list k;
for(k=a[x];k;k=k->next)
  if(viz[k->vec]==0)
     go(k->vec,nv+1);               
  else
     if(niv[k->vec]==niv[x]-2)
        sol++;          
}     

int main()
{
FILE *fin=fopen("triplete.in","r"),
     *fout=fopen("triplete.out","w");
 
int n,m,i,x,y;
fscanf(fin,"%d%d",&n,&m);
for(i=1;i<=m;i++)
  {
  fscanf(fin,"%d%d",&x,&y);
  if(a[x]==NULL)
    a[x]=z[x]=new nod;
  else
    {
    z[x]->next=new nod;
    z[x]=z[x]->next;              
    }               
  z[x]->vec=y;
  z[x]->next=NULL;
  
  if(a[y]==NULL)
    a[y]=z[y]=new nod;
  else
    {
    z[y]->next=new nod;
    z[y]=z[y]->next;              
    }  
  z[y]->vec=x;
  z[y]->next=NULL;
  }

memset(viz,0,sizeof viz);  
go(1,0);                

fprintf(fout,"%d\n",sol);

fclose(fin);
fclose(fout);
return 0;
}