import os

def trim_last_newline(file_path):
    with open(file_path, 'r+') as file:
        file.seek(0, os.SEEK_END)
        file.seek(file.tell() - 1, os.SEEK_SET)
        file.truncate()

def process_pos_file():
    with open('pos.txt', 'r') as file:
        data = file.read()
    data = data.replace('.jpg', '.jpg 1 0 0 20 20')
    with open('pos.txt', 'w') as file:
        file.write(data)


if __name__ == "__main__":
    trim_last_newline('neg.txt')
    trim_last_newline('pos.txt')
    process_pos_file()