Real Vim ninjas count every keystroke - do you?

Pick a challenge, fire up Vim, and show us what you got.

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$ gem install vimgolf
$ vimgolf setup
$ vimgolf put 52222f6ea98cbe0002000078

Letter case trickery

This file is in a downright esoteric format, consisting of hexadecimal numbers, non-hexadecimal keywords, and "Z" indicating end-of-line. Make the hexadecimal numbers lowercase.

Start file
2B A9 NE F2Z
End file
a4e SUM 3c0Z
2b a9 NE f2Z

View Diff

< A4E SUM 3C0Z
< 2B A9 NE F2Z
> a4e SUM 3c0Z
> 2b a9 NE f2Z

Solutions by @nathanmwallace:

Unlock 3 remaining solutions by signing in and submitting your own entry
Created by: @NbTson

500 active golfers, 1553 entries

Solutions by @nathanmwallace:
#61 - Nathan Wallace / @nathanmwallace

11/05/2013 at 08:09PM

#>206 - Nathan Wallace / @nathanmwallace

11/05/2013 at 08:03PM

#>404 - Nathan Wallace / @nathanmwallace

11/05/2013 at 08:02PM