planet of the apes I have a system

 The female ape, whom he tentatively named Zara, proved to be his lifeline. She led him to a small cave, a hidden sanctuary amongst the rocks. It was crude, but it offered shelter from the elements and the watchful eyes of other apes. Zara, a solitary hunter, shared her meager meals with him, teaching him which plants were edible, and which were poisonous. She showed him how to hunt small game, how to use the sharp stones as crude tools. Slowly, painfully, Jake began to adapt. His body, once frail, grew stronger, more attuned to the rhythms of the wild. His senses sharpened, his hearing becoming almost preternatural. He learned the language of the apes, their grunts and howls, their subtle shifts in body language. He was no longer the human pilot. He was something else entirely – a survivor, a creature born anew in this strange, unforgiving world.