en.javascript.info/9-regular-expressions/08-regexp-greedy-and-lazy/1-lazy-greedy/solution.md

The result is: `match:123 4`.

First the lazy `pattern:\d+?` tries to take as little digits as it can, but it has to reach the space, so it takes  `match:123`.

Then the second `\d+?` takes only one digit, because that's enough.