They're genocidal inmates, most of them, and they're stirring the contents of their own latrines, because if you put poop in a sealed environment, in a tank, pretty much like a stomach, then, pretty much like a stomach, it gives off gas, and you can cook with it.
囚人の多くが大量虐殺犯です 彼らは自分のトイレを かき混ぜています なぜなら密閉されたタンクの中に 大量に排泄物が溜まると 胃と同じようにガスを放ち 燃料として調理に使えます