var a:array[1..4096,1..4096] of boolean;
    f,g:text;
    n,j,x,y:integer;
    nr,m,i:longint;
begin
 assign(f,'triplete.in'); reset(f);
 assign(g,'triplete.out'); rewrite(g);
 read(f,n,m);
 nr:=0;
 for i:=1 to m do begin
  read(f,x,y);
  a[x,y]:=true;
  a[y,x]:=true;
  for j:=1 to n do
   if (a[x,j]) and (a[y,j]) then
    inc(nr);
 end;
 writeln(g,nr);
 close(f); close(g);
end.