def get_letter_count(message):
    """Returns a dictionary with keys of single letters and values of the
    count of how many times they appear in the message parameter."""
    letter_count = {}
    for letter in message.upper():  # Uniform letters to uppercase
        if letter in [' ', ',', '.']:
            continue
        if letter not in letter_count:
            letter_count[letter] = 1
        else:
            letter_count[letter] += 1

    return letter_count