const
  n = 10;

var
  i, sum :integer;
  
  a :array [1..n] of integer;

begin

  for i:= 1 to n do
    readln(a[i]);
    
  sum:= 0;
  for i:= 1 to n do
    if (a[i] > 0) and (a[i] mod 2 = 0) then
      sum:= sum + a[i];
      
  writeln(sum);

end.