def check(x, y):
    for z in range(n):
        if z!=x and z!=y and G[z][x]==1 and G[z][y]==1 and G[x][y]==0:
            return False
    
    return True

n, m = map(int, input().split())
G = [[0]*n for _ in range(n)]

for _ in range(m):
    a, b = map(int, input().split())
    G[a-1][b-1] = 1
    G[b-1][a-1] = 1

ans = 0

for i in range(n):
    for j in range(i+1, n):
        for k in range(j+1, n):
            if check(i, j) and check(j, k) and check(k, i):
                ans += 1
    
print(ans)