What is the optimal format and database for storing multidimensional related data?

Question

MySQL

Hello.
The task is to store many interconnected "pieces" of data.
Example: one digit is a "letter" of the alphabet of values ​​(0-9):
Initially, there are sequences of combinations:
text1: "111 222 33333 444 555"
text2: "777 888 222 33333 999 111"
must be saved in the following format 3 columns: ( one line - one record)
[sequence], [sequence on the left], [sequence on the right]:
111 (blank) 222
111 999 (blank)
222 111 33333
222 888 33333
33333 222 444
33333 222 999
444 33333 555
..... ..........
etc.
What format and database for storing multidimensionally related data will be optimal?
Need a fast search and plan to store a very large amount of data.
In advance, THANK YOU ALL for your help!

Answer 1

In my opinion, there is a need for graph databases.
Try Neo4j.