#include<cstdio>
#include<vector>
#define NMAX 4100
using namespace std;
FILE *fin,*fout;
vector<short> G[NMAX];
short n,D[NMAX];
bool use[NMAX],marked[NMAX];
int s;
int abs(int a)
{
	if(a<0)
		return -a;
	return a;
}
void read()
{
	fin=fopen("triplete.in","r");
	int m;
	short x,y;
	fscanf(fin,"%hi %d",&n,&m);
	while(m--)
	{
		fscanf(fin,"%hi %hi",&x,&y);
		G[x].push_back(y);
		G[y].push_back(x);
	}
	fclose(fin);
}
void DFS(int nod)
{
	int vec;
	use[nod]=1;
	marked[nod]=1;
	for(size_t i=0;i<G[nod].size();i++)
	{
		vec=G[nod][i];
		if(!use[vec])
		{
			D[vec]=D[nod]+1;
			DFS(vec);
		}
		else
			if(D[vec] && abs(D[vec]-D[nod])==2)
				s++;
	}
	use[nod]=0;
	D[nod]=0;
}
int main()
{
	read();
	for(int i=1;i<=n;i++)
		if(!marked[i])
		{
			D[i]=1;
			DFS(i);
		}
	fout=fopen("triplete.out","w");
	fprintf(fout,"%d",s/3);
	fclose(fout);
	return 0;
}