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 9v0063d76854000000000249

Paste a column after a column

This task is very common while using multi-cursor. What is the elegant vim way ?

Start file
Names
Donald Knuth
Sebastian Thrun
Peter Norvig
Satoshi Nakamoto
Age
100
50
60
45
End file
Names,Age
Donald Knuth,100
Sebastian Thrun,50
Peter Norvig,60
Satoshi Nakamoto,45

View Diff

1,10c1,5
< Names
< Donald Knuth
< Sebastian Thrun
< Peter Norvig
< Satoshi Nakamoto
< Age
< 100
< 50
< 60
< 45
---
> Names,Age
> Donald Knuth,100
> Sebastian Thrun,50
> Peter Norvig,60
> Satoshi Nakamoto,45

Solutions by @JimmyJamesII:

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

553 active golfers, 2537 entries

Solutions by @JimmyJamesII:
16
#125 - James Harvey / @JimmyJamesII

02/11/2023 at 10:35PM

17
#>191 - James Harvey / @JimmyJamesII

02/11/2023 at 10:20PM

18
#>239 - James Harvey / @JimmyJamesII

02/11/2023 at 10:15PM

18
#>239 - James Harvey / @JimmyJamesII

02/11/2023 at 10:18PM

19
#>271 - James Harvey / @JimmyJamesII

02/11/2023 at 10:12PM

22
#>332 - James Harvey / @JimmyJamesII

02/11/2023 at 09:59PM

22
#>332 - James Harvey / @JimmyJamesII

02/11/2023 at 10:02PM

22
#>332 - James Harvey / @JimmyJamesII

02/11/2023 at 10:09PM

30
#>410 - James Harvey / @JimmyJamesII

02/11/2023 at 09:51PM

32
#>417 - James Harvey / @JimmyJamesII

02/11/2023 at 09:50PM

34
#>425 - James Harvey / @JimmyJamesII

02/11/2023 at 09:48PM