18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A2063XXXXX the last 5 characters
It is very easy task, I may prepare a program for that in java if you have only CPU.
But it you have access to GPU, you may easily do this using BitCrack
https://github.com/brichard19/BitCrackConfiguration is simple:
--keyspace 18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A206300000:18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A2063FFFFF
and your address. It will take just a moment.
You know address, right?
If not, you may always test all of them -> create 1 million of private keys and check their balance - it is doable.
Other question is if you know if address is compressed or not - you may always use parameter "--compression both"