even if you type the exact letters it will not solve.
what is the deal with these new captchas?
Delete cookies, clear cache and restart browser. If it happens again, repeat.
For some random reason, Google may think you are a spammer. Happened to me few weeks ago and it wasn't pleasant at all, but doing those steps worked for me.
>do not even try to solve this captchas, even if you get them right, google will ask you to solve again.