Overlapping time within one column

Hi.

I've been trying to create a formula that checks if the time of two rows overlap and then post true or false. I've had no luck so I've come here for help, what I'm trying to do is have a formula that works like this:

Column J

07.00-12.00
07.00-16.00

So the upper part would check if it overlaps with the lower one and if it does it would be false. I've provided an excel with full of time values, hope my question is clear .