2) https://news.ycombinator.com/item?id=31580410
3) https://news.ycombinator.com/item?id=31580459
4) https://news.ycombinator.com/item?id=31581719
5) https://news.ycombinator.com/item?id=31581773
7) https://news.ycombinator.com/item?id=31582128
8) https://news.ycombinator.com/item?id=31582479
9) https://news.ycombinator.com/item?id=31583014
10) https://news.ycombinator.com/item?id=31583387
11) https://news.ycombinator.com/item?id=31584321
12) https://news.ycombinator.com/item?id=31584560