Letter Round Pendants Should You Send A Second Thank You Letter Following The Second Round Of Interviews?

Should you send a second thank you letter following the second round of interviews? - letter round pendants

I just had a second interview with the team and the director, do you think they should send another letter of thanks to the hiring manager.
I sent a letter of thanks after the first interview, I send another? How do I know if I send one?
With personnel managers of the e-mail.