# Pastebin OkEvXMR3
x = scandir(ben_dir)
folders = [folder.name for folder in x if folder.is_dir()]
prefix_num = ['{:03d}'.format(int(dir_string[:3])) for dir_string in folders]
print(prefix_num)
print(max(prefix_num))
inc_prefix = 0
inc_prefix += max(prefix_num)