I challenge you to get the pronunciation of 12th couplet from the book called "ThirukuraL" correct in a flow. (may not be 100% at-least to a 80 or 85%).
Let me give an introduction to ThirukuraL.You may have heard of it.It is something like bible but it is not coupled with any religion.It is one of the books that have been translated in more languages; which consisting of 1330 couplets originally written in Tamil language by Thiruvalluvar.
Thirukural is structured into 133 chapters, each containing 10 couplets, for a total of 1330 couplets.The 133 chapters are grouped into three sections.
More detail here
https://en.wikipedia.org/wiki/Tirukku%E1%B9%9Ba%E1%B8%B7
Here you can find the English version.
https://thirukkural133.wordpress.com/2011/11/26/chapter-2-glory-of-rain/
But you need get the pronunciation of 12th verse right in a flow from it's original version I mean Tamil version.:)
Hope you will be able to find some native speakers who will help you in practicing and then evaluating your performance as well. :)
By the way it is a great book and you might want to read it if you haven't read already.Belated birthday wishes.God bless.