public class Main
{
   public static void main(String[] args) throws Exception
   {
      String string = "This is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.\nThis is a string.s";
      String catastrophicRegex = "(.* .* .*\\.(\r?\n|$))*";
      System.out.println(string.matches(catastrophicRegex));
   }
}

cHVibGljIGNsYXNzIE1haW4KewogICBwdWJsaWMgc3RhdGljIHZvaWQgbWFpbihTdHJpbmdbXSBhcmdzKSB0aHJvd3MgRXhjZXB0aW9uCiAgIHsKICAgICAgU3RyaW5nIHN0cmluZyA9ICJUaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLlxuVGhpcyBpcyBhIHN0cmluZy5cblRoaXMgaXMgYSBzdHJpbmcuXG5UaGlzIGlzIGEgc3RyaW5nLnMiOwogICAgICBTdHJpbmcgY2F0YXN0cm9waGljUmVnZXggPSAiKC4qIC4qIC4qXFwuKFxyP1xufCQpKSoiOwogICAgICBTeXN0ZW0ub3V0LnByaW50bG4oc3RyaW5nLm1hdGNoZXMoY2F0YXN0cm9waGljUmVnZXgpKTsKICAgfQp9