def count(char, string):
    counter = 0
    for letter in string:
        if char == letter:
            counter += 1
    return [char, counter]

def make_list(string):
    used_letters = ""
    answer = []
    for i in string:
        if i not in used_letters:
            answer += [count(i, string)]
            used_letters += i
    return answer


def sort_list(ls):

    swap(ls)
    ls.sort()
    swap(ls)

def swap(ls):
    for i in ls:
        i[1],i[0] = i[0],i[1]