def inp() a=gets.chomp.split(" ").map(&:to_i)end 
def inpf() a=gets.chomp.split(" ").map(&:to_f)end
def inps() a=gets.chomp.split(" ")end  
def copy(a) Marshal.load(Marshal.dump(a)) end
def kaizyo(n)(n < 2)? 1 : (2..n).inject(:*) end
def scount(a) b=na(a.max+1);a.each{|n|b[n]+=1};return b end
def na(n,d=0) Array.new(n,d)end
def na2(n,m,d=0) Array.new(n){Array.new(m,d)}end
def na3(n,m,l,d=0) Array.new(n){Array.new(m){Array.new(l,d)}}end
def bit(n) a.to_s(2).split("").map(&:to_i) end
def ok(d1,d2,d3,d4)
  if(@tab[[d1,d2]] != nil and @tab[[d1,d3]] != nil)
    if((@tab[[d1,d4]] == nil) and (@tab[[d2,d3]] == nil)and @tab[[d2,d4]] != nil and @tab[[d4,d3]]!=nil)
      return true
    end
  end
  if(@tab[[d1,d4]] != nil and @tab[[d1,d3]] != nil)
    if((@tab[[d1,d2]] == nil) and (@tab[[d4,d3]] == nil) and @tab[[d3,d2]] != nil and @tab[[d4,d2]]!=nil)
      return true
    end
  end
  if(@tab[[d1,d2]] != nil and @tab[[d1,d4]] != nil)
    if((@tab[[d1,d3]] == nil) and (@tab[[d2,d4]] == nil) and @tab[[d2,d3]] != nil and @tab[[d4,d3]]!=nil)
      return true
    end
  end
  return false
end  
  
n,m=inp
@tab = {}
m.times do
  a,b = inp
  @tab[[a,b]] = 1
  @tab[[b,a]] = 1
end
c = 0
(0..(n-4)).each do |one|
  ((one+1)..(n-3)).each do |two|
    ((two+1)..(n-2)).each do |three|
      ((three+1)..(n-1)).each do |four|
        c += 1 if(ok(one,two,three,four))
      end
    end
  end
end
puts c

=begin


=end