How to write macro or snippet in Sublime Text 3?

Question

Regular Expressions

Good time. How to correctly implement such functionality For example, there is some text, how to put a number at the beginning of each line starting from 10, etc. (there are more than a thousand lines in the text)
it was:
some text
some text
some text
some text
should become:
10 some text
11some text
12some text
13some text

Answer 1

Emmet has a trick.
Wrap Abbrevation (CTRL+Shift+G, may vary by system):
Only one blank line is put at the beginning, but I think this is not a problem.