An Artwork Made from Several Countries

Last year I went to 12 different countries around the world. I made an AI to convert every country that I've visited into a beautiful artwork as a reminder. I input the 12 countries name, then somehow my AI produces the following output:

Hello Mal, You have visited many countries, huh?

So, this is a beautiful art for you:

----------
|-\--\\> |
|o\**--> |
|-X--5*> |
|+*>---> |
|(|**|-> |
|1-4-5-3-8-15-4-7-7-6-9|
------------------------

Beautiful isn't it?

And to make sure you don't forget, here's the key (sorted):

5-5-8-5-8-17-7-7-11-7-11-11


Actually, the artwork produced is not as expected :/ first, it's not beauty at all! and the last line of the artwork is very strange and looks different from the others.

After finding out how my AI worked, I guess, the odds on the last line was caused by a country that I have visited. Can you guess what is the country? and why does it make an error?

Hint 1

I tried to track its internet history, and I think, my AI didn't visit many websites when processing the artwork, actually, it only visited one page of wikipedia.org

Hint 2

Ah.. finally I remember the name of one of the countries I had visited: Trinidad and Tobago

• Looking at that particular art style makes me wonder if the computer-puzzle tag might be appropriate.. – Bass Dec 3 '18 at 3:57
• Could you give more hints please? – SDwarfs Dec 8 '18 at 16:31