Rewrite Rule - Remove numbers after forward slash - .htaccess

Question

I have a bunch of 404 links, close to 500 resulting from a link looking like:
http://www.domain.com/component/k2/item/192-file-sharing-options-to-consider.html
The link needs to be shown as follows, except the ID 192 and portion after is an ALIAS for a blog item.
http://www.domain.com/component/k2/item/file-sharing-options-to-consider.html
We essentially need to remove the '192-' from the link, and have this happen to all blog links (the number can be anything from 1, 2, or 3 digits)
I've tried something of this sorts
RewriteCond /component/k2/item/
RewriteRule ^([0-9]+)$ /component/k2/item/$1
I know this may not be proper, but I am slowly trying to learn how this all works.
Also /component/k2/item/ can be found as /blog/item/ in some links
Updated for htaccess:
##
# #version $Id: htaccess.txt 21064 2011-04-03 22:12:19Z dextercowley $
# #package Joomla
# #copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
# #license http://www.gnu.org/copyleft/gpl.html GNU/GPL
# Joomla! is Free Software
##
#####################################################
# READ THIS COMPLETELY IF YOU CHOOSE TO USE THIS FILE
#
# The line just below this section: 'Options +FollowSymLinks' may cause problems
# with some server configurations. It is required for use of mod_rewrite, but may already
# be set by your server administrator in a way that dissallows changing it in
# your .htaccess file. If using it causes your server to error out, comment it out (add # to
# beginning of line), reload your site in your browser and test your sef url's. If they work,
# it has been set by your server administrator and you do not need it set here.
#
#####################################################
## Can be commented out if causes errors, see notes above.
Options +FollowSymLinks
#
# mod_rewrite in use
RewriteEngine On
########## Begin - Rewrite rules to block out some common exploits
## If you experience problems on your site block out the operations listed below
## This attempts to block the most common type of exploit `attempts` to Joomla!
#
## Deny access to extension xml files (uncomment out to activate)
#<Files ~ "\.xml$">
#Order allow,deny
#Deny from all
#Satisfy all
#</Files>
## End of deny access to extension xml files
# Block out any script trying to set a mosConfig value through the URL
RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR]
# Block out any script trying to base64_encode data within the URL
RewriteCond %{QUERY_STRING} base64_encode[^(]*\([^)]*\) [OR]
# Block out any script that includes a <script> tag in URL
RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
# Return 403 Forbidden header and show the content of the root homepage
RewriteRule .* index.php [F]
#
########## End - Rewrite rules to block out some common exploits
########## Begin - Custom redirects
#
# If you need to redirect some pages, or set a canonical non-www to
# www redirect (or vice versa), place that code here. Ensure those
# redirects use the correct RewriteRule syntax and the [R=301,L] flags.
#
#K2 to new blog plugin redirect
#Strips blog ID- from URL and rewrites to blog/item
RewriteRule ^(component/k2/item)/[0-9]+-(.+)$ /$1/$2 [L,NC]
Redirect /component/k2/item/ http://www.managemyitinc.com/blog/item/
redirect 301 /blog/entry/ http://www.managemyitinc.com/blog/item/
redirect 301 /blog/categories/listings/ http://www.managemyitinc.com /blog/categories/categories/listings/
#Non www to www
RewriteCond %{HTTP_HOST} ^managemyitinc.com$
RewriteRule (.*) http://www.managemyitinc.com/$1 [R=301,L]
########## End - Custom redirects
# Uncomment following line if your webserver's URL
# is not directly related to physical file paths.
# Update Your Joomla! Directory (just / for root)
# RewriteBase /
########## Begin - Joomla! core SEF Section
#
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
#
# If the requested path and file is not /index.php and the request
# has not already been internally rewritten to the index.php script
RewriteCond %{REQUEST_URI} !^/index\.php
# and the request is for root, or for an extensionless URL, or the
# requested URL ends with one of the listed extensions
RewriteCond %{REQUEST_URI} (/[^.]*|\.(php|html?|feed|pdf|raw))$ [NC]
# and the requested path and file doesn't directly match a physical file
RewriteCond %{REQUEST_FILENAME} !-f
# and the requested path and file doesn't directly match a physical folder
RewriteCond %{REQUEST_FILENAME} !-d
# internally rewrite the request to the index.php script
RewriteRule .* index.php [L]
#
########## End - Joomla! core SEF Section

Answer 1

Try this rule as your first rule:
RewriteEngine On
RewriteRule ^(component/k2/item)/[0-9]+-(.+)$ /$1/$2 [L,R=301,NC]
This needs to be in DocumentRoot/.htaccess