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 56ef78d9f604b51ec4007b8d

Scrambled numbers

Four is NOT 1. One is 1.

Start file

Four is 1.
One is 2.
Five is 3.
Three is 4.
Six is 5.
Two is 6.

End file

One is 1.
Two is 2.
Three is 3.
Four is 4.
Five is 5.
Six is 6.

View Diff

This one's pretty tough!
At least I hope it is.
Before posting, I have an 18.

Solutions by @WutongYujie:

Created by: @udioica Tweet

184 active golfers, 807 entries

Solutions by @WutongYujie: