def mode_counter(arr):
    dict_arr = {}
    for element in arr:
        dict_arr[element]=0
    for element in arr:
        index = [i for i,e in enumerate(arr) if e == element]
        dict_arr[element]=len(index)
    max_count = max(dict_arr, key=dict_arr.get)
    return max_count

def sort_alpha(input_string):
    # Initialize an empty list to store the words
    words = []

    # Initialize variables to keep track of the current word
    current_word = ""
    is_inside_word = False

    # Iterate through each character in the input string
    for char in input_string:
        if char == ',':
            # If a comma is encountered, append the current word to the list
            if is_inside_word:
                words.append(current_word)
                current_word = ""
                is_inside_word = False
        else:
            # Add the character to the current word
            current_word += char
            is_inside_word = True

    # If there's a word left after the loop, append it to the list
    if is_inside_word:
        words.append(current_word)

    # Sort the list of words alphabetically
    words.sort()

    # Create a sorted string by joining the sorted words with commas
    sorted_string = ""
    for word in words:
        sorted_string += word + ","

    return sorted_string[:-1]