[wvxvw]

var s:String = "12345123451234512345123451234512345";
var buf:Array/*String*/ = [];
var len:int = s.length;
var i:int = -5;
for (i = 0; i < len; i += 5)
{
	buf.push(s.substr(i, 5));
}
trace(buf.join("\r"));