Root SM-A500FU [HELP NEEDED]

So, I was searching how to root my phone, and I founds some articles, but they aren't the build version of my phone. I can't install the newer firmware, because It's not available in my carrier's version.
My phone's build number is: LRX22G.A500FUXXU1BOL1
and my carrier is Hungary Vodafone.

Can someone tell me a method to root my phone, keeping my current firmware? Any help is appreciated!

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