Challenge 27
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Count Vowels
Create a procedure to take in a string parameter and output the number of vowels (a, e, i, o, u) and other non-vowel alphanumeric characters (b, c, d, 0, 1, 2 etc)
Spaces and punctuation should be ignored and your program should treat uppercase and lowercase as being equivalents
Examples:
countVowels("hello, world") should print:
a: 0
e: 1
i: 0
o: 2
u: 0
others: 7
Extension:
Output the vowels in order of most to least frequest