VBA to highlight duplicates in combinations of 2 ranges

[Netvice]

I would appreciate your help in the following issue: 3 columns with dates, 6 columns with names. Any name can be in any column J-O, any date can be in any column G-i. Even on different rows.

One name cannot be assigned a date >= 2 times (the guy can't be auditing in 2 places at the same time).
When this happens, I need highlighted the duplicate date and name.

I have included 2 images ("Registru", where I need to input the VBA code and "Registru2", where I exemplified finding the duplicates using 18 additional columns concatenating date + name).

Thank you very much,

Registru.xlsm
	G	H	I	J	K	L	M	N	O
1	ziua 1	ziua 2	ziua 3	Auditor sef	Auditor 1	Auditor 2	Auditor 3	Expert tehnic 1	Expert tehnic 2
2	15-Jan-2023	16-Jan-2023	17-Jan-2023	Name1	Name3	Name5	Name8	Name10	Name15
3	14-Jan-2023	15-Jan-2023	16-Jan-2023	Name2	Name1	Name7	Name7	Name11	Name16
4	12-Jan-2023	13-Jan-2023	14-Jan-2023	Name2	Name4	Name1		Name12	Name17
5	10-Jan-2023	11-Jan-2023	15-Jan-2023	Name3	Name6	Name8		Name13
6	09-Jan-2023	09-Jan-2023	10-Jan-2023	Name4	Name7			Name14
Iesiri

Cells with Data Validation
Cell	Allow	Criteria
J2:O6	List	=Liste!$A$2:$A$16