print grep { !/process/  } <>;

##</code><code>##

perl <script>.pl <input>.txt

##</code><code>##

ksjhfk
kfh

##</code><code>##

my @process = grep { !/process/  } <>;

##</code><code>##

{
    local undef $/;
    print split /process \s \w+ (.+?) end \s process/xms, <>;
}