using System;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
Console.WriteLine(
Regex.Replace(
"quickbrownfoxjumpsoverthelazydog"
, "(.{5})"
, "$1\r\n"
)
);
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uVGV4dC5SZWd1bGFyRXhwcmVzc2lvbnM7CgpwdWJsaWMgY2xhc3MgVGVzdAp7CglwdWJsaWMgc3RhdGljIHZvaWQgTWFpbigpCgl7CgkJQ29uc29sZS5Xcml0ZUxpbmUoCgkJCVJlZ2V4LlJlcGxhY2UoCgkJCQkicXVpY2ticm93bmZveGp1bXBzb3ZlcnRoZWxhenlkb2ciCgkJCSwgICAiKC57NX0pIgoJCQksICAgIiQxXHJcbiIKCQkJKQogICAgICAgICk7Cgl9Cn0=