def num_to_emoji(num:int):
    """ Retrieve emoji related to a number

        Parameters
        ----------
        num: int
            number
        Returns
        -------
        str
            emoji that represent a number
        """
    number = {
        0: ':zero:',
        1: ':one:',
        2: ':two:',
        3: ':three:',
        4: ':four:',
        5: ':five:',
        6: ':six:',
        7: ':seven:',
        8: ':eight:',
        9: ':nine:',
    }
    return number[num]