I did this:

s = input().lower()

# Create dictionary of each char count
dict = {char: s.count(char) for char in s}

# Return list of tuples by value count in descending order, and alphabetic for equal values
sorted_list = sorted(dict.items(), key = lambda x: (-x[1], x[0]))

# Print top three values of sorted_list
for key, value in sorted_list[:3]:
    print(key, value)