$type = str_replace("index.php?page=topic&show=1&id=","t",$type);

               $type = str_replace("index.php?page=topic&show=1&id=","t",$type);

               $type = str_replace("index.php?page=topic&show=1&id=","r5r5",$type);

               $type = str_replace("index.php?page=topic&show=1&id=","r5r5",$type);

RewriteRule ^r5r5([0-9]+).html index.php?page=topic&show=1&id=$1 [L]

RewriteRule ^r5r5([0-9]+)&password=(.*)&count=([0-9]+) index.php?page=topic&show=1&id=$1&password=$2&count=$3 [L]

RewriteRule ^r5r5([0-9]+)&count=([0-9]+) index.php?page=topic&show=1&id=$1&count=$2 [L]

RewriteRule ^r5r5([0-9]+)&last_post=1&count=([0-9]+) index.php?page=topic&show=1&id=$1&last_post=1&count=$2 [L]

RewriteRule ^r5r5([0-9]+) index.php?page=topic&show=1&id=$1 [L]