tall = {}

function check(i1, i2, i3, i4)
  if(tall[i1][i2] and tall[i1][i3] and tall[i2][i4] and tall[i3][i4] and (tall[i1][i4] == nil and tall[i2][i3] == nil)) then
    return true
  elseif(tall[i1][i3] and tall[i1][i4] and tall[i2][i3] and tall[i2][i4] and (tall[i1][i2] == nil and tall[i3][i4] == nil)) then
    return true
  elseif(tall[i1][i2] and tall[i1][i4] and tall[i2][i3] and tall[i3][i4] and (tall[i1][i3] == nil and tall[i2][i4] == nil)) then
    return true
  end
  return false
end

n, m = io.read("*n", "*n")
for i = 1, n do
  tall[i] = {}
end
for i = 1, m do
  a, b = io.read("*n", "*n")
  a, b = a + 1, b + 1
  tall[a][b] = true
end
cnt = 0
for i_a = 1, n - 3 do
  for i_b = i_a + 1, n - 2 do
    for i_c = i_b + 1, n - 1 do
      for i_d = i_c + 1, n do
        if(check(i_a, i_b, i_c, i_d)) then cnt = cnt + 1 end
      end
    end
  end
end
print(cnt)