N, M = gets.split.map(&:to_i)
E = Array.new(N + 1) { Array.new(N + 1, false) }

M.times do
  a, b = gets.split.map(&:to_i)
  E[a][b] = E[b][a] = true
end

def checker(v1, v2, v3, v4)
  return false if E[v1][v2]
  return false if E[v3][v4]
  return false if !E[v1][v3]
  return false if !E[v1][v4]
  return false if !E[v2][v3]
  return false if !E[v2][v4]

  true
end

ans = 0

[*0..N - 1].combination(4) do |list|
  res = false
  res |= checker(list[0], list[1], list[2], list[3])
  res |= checker(list[0], list[2], list[1], list[3])
  res |= checker(list[0], list[3], list[1], list[2])

  ans += 1 if res
end

puts ans