program proverka;
uses crt;
const n=10;
var c,i:integer;

function proverk (var a:array of integer):integer;
  var i,j:integer;
  begin
    for i:=1 to n-2 do 
      if b[i] mod 2 <> 0 then
	if b[i+1] mod 2 <> 0 then
	  if b[i+2] mod 2 <> 0 then
	    begin
	     proverk:=i;
	     exit;
	    end;
      proverk:=0;
  end;
begin
 clrscr;
  for i:= 1 to n do begin
  readln(a[i]);
  c:=proverk(a[i]);
  write('   ',c);
  writeln;
  end;
end.