def METHOD_NAME(in_path_prefix: str, src: str, tgt: str, out_path: str):
    with open(out_path, "w") as f_o:
        for lang in [src, tgt]:
            with open(f"{in_path_prefix}.{lang}") as f:
                for s in f:
                    f_o.write(byte_encode(s.strip()) + "\n")