combining two sets of rows

Hi everyone!
I'd like to combine/distribute 2 sets of rows. I mean, as a result we have to see all rows of 1st set combined with all rows of 2nd.
In columns B and C are the 1st set and columns F to H the 2nd. The result, columns K to O.
Both sets can be increased. And I'd like to use functions and/or formulas.
Please, see the attachment file.

Thanks in advance.