Real Vim ninjas count every keystroke - do you?

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$ gem install vimgolf
$ vimgolf setup
$ vimgolf put 57fbb753ab6108077204f440

7th Birthday

We have a bunch of numbers written from 0 to 9 in the order present in the text input file. The task is to create 7 by replacing the numbers with dashes.

Start file

12345678901234
23456789012345
34567890123456
45678901234567
56789012345678
67890123456789
78901234567890
89012345678901
90123456789012

End file

12-----------
2--56789012--5
3456789012--56
456789012--567
56789012--5678
6789012--56789
789012--567890
89012--5678901
9012--56789012

View Diff

1,9c1,9
< 12345678901234
< 23456789012345
< 34567890123456
< 45678901234567
< 56789012345678
< 67890123456789
< 78901234567890
< 89012345678901
< 90123456789012
---
> 12-----------
> 2--56789012--5
> 3456789012--56
> 456789012--567
> 56789012--5678
> 6789012--56789
> 789012--567890
> 89012--5678901
> 9012--56789012

Solutions by @lvturkeyman:

Created by: @pradeep6kumar Tweet

75 active golfers, 202 entries

Solutions by @lvturkeyman: