(Occurrences of each digit in a string) Write a function that counts the occurrences of each digit in a string using the following header:
            def count(s):
The function counts how many times a digit appears in the string. The return value is a list of ten elements, each of which holds the count for a digit. For example, after executing counts = count("12203AB3"), counts[0] is 1, counts[1] is 1, counts[2] is 2, and counts[3] is 2. Write a test program that prompts the user to enter a string and displays the  number of occurrences of each digit in the string. Here is a sample run of the program:

Enter a string: 232534312
1 occurs 1 time
2 occurs 3 times
3 occurs 3 times
4 occurs 1 time
5 occurs 1 time