#include <stdio.h>
#include <vector>
#include <algorithm>
#include <math.h>
 
using namespace std;

int n, m;

bool a[4100][4100];
short nr1[4100][4100];

int main() {
	freopen("triplete.in", "r", stdin);
	freopen("triplete.out", "w", stdout);

	scanf("%d %d", &n, &m);

	for (int i = 0; i < n; ++i) {
		int x, y;
		scanf("%d %d", &x, &y);
		a[x][y]++;
		a[y][x]++;
	}

	int result = 0;

	for (int i = 1; i <= n; ++i) {
		for (int j = n; j > i; j--) {
			nr1[i][j] = nr1[i][j + 1] + a[i][j];
		}
	}

	for (int i = 1; i <= n; ++i) {
		for (int j = i + 1; j < n; ++j) {
			if (a[i][j]) {
				result += nr1[i][j + 1];
			}
		}
	}

	printf("%d", result);

	return 0;
}