Translation:Fourteen, fifteen, sixteen.
No, actually, Duo doesn't reject translations due to incorrect or missing punctuation or capitalization so there might have been another error. A screenshot would help us resolve this.
Unfortunately I have moved on by omitting the spaces so cannot now do a screen shot. But I got it wrong twice! The first time with spaces but no commas, the second with commas and spaces. I checked the spellings meticulously and they were correct. Having looked at earlier posts it seems that this has been an ongoing problem with others for some time. I just wanted you to know that it is still a problem. Otherwise I love this programme and feel my Greek has not gone to sleep this winter!
Thanks for your input and yes we've noticed the many issues with this exercise and haved decided to "retire" it until the new tree comes out.
Your comments are always valuable and welcome and we're glad your Greek has not "gone to sleep" and hope we can continue to add to it.