How to solve audio captchas?

Have you ever got the audio captchas at Kolotibablo? Usualy you need to retype what audio captcha says, like "five, four, seven, eight...", and you need to retype this with numbers.

But what should we type when we get the audio captcha saying: "We are sorry..."? It looks like this:

So, admin has not told what to do in such cases, so, are we free to do as we wish? This could be also rare captchas but they come.

If you know the right answer to this captcha, please write it here, thanks.