Back to the Stock from MM

Hey, I after trying many custom roms I decided to go back to stock. Currently I'm using Resurrection Remix based in android 6.0.1. Is it possible to back from this rom to the latest stock? I just want to go back, without locking bootloader (ofc if this is possible). Or maybe it's possible to flash custom Rom based on stock right from my current Rom? Anyone can help? I'm S-ON

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