I have a text file which part of it is displayed below. 

Example

RENTAL NOTICE LETTER


 EXHIBIT 10.2    FIRST RESTATED AND AMENDED    AUTO LEASE NOTICE    THIS LEASE is made as of the 1st day of March, 2001, by and between HANNAH RENTAL, CO. a Maine Corporation having its principal offices in Portland 


End


What I want is to extract any phrase that contains the word "NOTICE". In this example, both "RENTAL NOTICE LETTER" and "AUTO LEASE NOTICE" are the information that I need.

Because there can be two ways for locating the phrase "XXX NOTICE YYY":
(1) (boundary or begining of line) XXX NOTICE YYY (\n);
(2) (more than two spaces, such as "   ") XXX NOTICE YYY (more than two spaces, such as "   "    ); 

I tried with the following:

if ($a =~ /(?:\b|  +?)(.+)*(NOTICE)(.+)*(?:\n|  +?)/i)
    {
     print $1." ".$2." ".$3."\n";
    }