system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] How was Saruman able to breed orc hybrids?
gpt
It's probably not too difficult, though unpleasant to think about.  We don't know exactly where or how Orcs came into being, but it's likely that Men and or Elves were twisted into Orcs or used as inspiration in some way (4th wall break: Orcs from twisted Elves is a common misconception.  Tolkien never decided on a firm origin for them).  Orcs breed like Humans/Elves/Hobbits, and if Men and Elves can interbreed then it stands to reason that Orcs and Men can interbreed.

Any more specifics are best left out I'd assume.