Trimming command

Hey Felix, I did my best at slimming down the command. I could trim out a bunch more, but I haven't been able to figure out how to combine -e (script; multiple sed scripts strung together) with -r (extended regex; allows for '+' to symbolize 'one or more'... instead of [0-9][0-9]* we could just use [0-9]+). I also read that -r is not portable, so I was a bit worried that might cause issues on certain machines.


Here is some notes about regex-extended from this [source](https://www.gnu.org/software/sed/manual/sed.html#index-g_t_0040acronym_007bGNU_007d-extensions_002c-extended-regular-expressions-33):

`-r
--regexp-extended
Use extended regular expressions rather than basic regular expressions. Extended regexps are those that egrep accepts; they can be clearer because they usually have less backslashes, but are a GNU extension and hence scripts that use them are not portable. See Extended regular expressions. `