Question: Write a program to count the number of vowels(A, E, I, O, and U) in an input string. The input may have upper case letters

Write a program to count the number of vowels(A, E, I, O, and U) in an input string. The input may have upper case letters as well as lower case letters. You may like to convert the input to lowercase so that you only need to check five lowercase vowels. Sample runs Input 1:

abcOIUie

Output 1:

6 

Input 2:

123v

Output 2:

0 

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