.htaccess - how to remove repeated characters from url?

Question

I have the following url:

example.com/hellllllllllo

And I was looking for a way to avoid repeated characters up to double.

Inspired

Answer 1

Here is my full answer to avoid repeated characters in urls using lazy match as suggested by samurai8 in previous comments:

FOR REPEATED SLASHS AND DASHES

RewriteCond %{REQUEST_METHOD}  !=POST
RewriteCond %{REQUEST_URI} ^(.*?)(/{2,})(.*)$
RewriteRule . %1/%3 [R=301,L]

RewriteCond %{REQUEST_METHOD}  !=POST
RewriteCond %{REQUEST_URI} ^(.*?)(-{2,})(.*)$
RewriteRule . %1-%3 [R=301,L]

RewriteCond %{REQUEST_METHOD}  !=POST
RewriteCond %{REQUEST_URI} ^(.*?)(_{2,})(.*)$
RewriteRule . %1_%3 [R=301,L]

FOR REPEATED LETTERS IN WORDS

RewriteCond %{REQUEST_METHOD}  !=POST
RewriteCond %{REQUEST_URI} ^(.*?)a{3,}(.*)$
RewriteRule . %1aa%2 [R=301,L]

RewriteCond %{REQUEST_METHOD}  !=POST
RewriteCond %{REQUEST_URI} ^(.*?)b{3,}(.*)$
RewriteRule . %1bb%2 [R=301,L]

RewriteCond %{REQUEST_METHOD}  !=POST
RewriteCond %{REQUEST_URI} ^(.*?)c{3,}(.*)$
RewriteRule . %1cc%2 [R=301,L]
.
.
.