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
A4E SUM 3C0Z
2B A9 NE F2Z
End file
a4e SUM 3c0Z
2b a9 NE f2Z

View Diff

1,2c1,2
< A4E SUM 3C0Z
< 2B A9 NE F2Z
---
> a4e SUM 3c0Z
> 2b a9 NE f2Z

Solutions by @_DeVVaN_:

Unlock 11 remaining solutions by signing in and submitting your own entry
Created by: @NbTson

498 active golfers, 1547 entries

Solutions by @_DeVVaN_:
9
#22 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:45AM

10
#>155 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:44AM

11
#>278 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:26AM

12
#>346 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:24AM

13
#>400 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:23AM

14
#>427 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:20AM

16
#>447 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:19AM

17
#>458 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:18AM

20
#>480 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:17AM

23
#>489 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:15AM

28
#>493 - Simon Ingelsson / @_DeVVaN_

08/16/2018 at 08:14AM