def sort_clients(stor, key):
    clients = stor.values()
    cl_data = [(client, client[key]) for client in clients if client[key] > 0]
    return sorted(cl_data, key=lambda data: data[1], reverse=True)


def seconds_to_text(seconds):
    minutes, seconds = divmod(seconds, 60)
    hours, minutes = divmod(minutes, 60)
    hours = str(hours) + 'h ' if hours > 0 else ''
    minutes = str(minutes) + 'm ' if minutes > 0 else ''
    seconds = str(seconds) + 's' if seconds > 0 else ''
    return hours + minutes + seconds