HOMEWORK:

Write a function to count how many vows(a, e, i, o, u) are in 
the input_msg.
The function should look like this:
def count_vows(input_msg):
	counter=0
	#your code should be here
	
	
	
	
	return counter

When you test the function, you should get results like this:
>>>count_vows("ABC")
1
>>>count_vows("BBC")
0
>>>count_vows("AEIOU")
5



HINT: Please work on the assignment before you read the hint.
Read this if you've worked on it without success.

This is what we built in last homework. It counts every char in the 
input_msg.  
def count_chars(input_msg):
	counter = 0
	for c in input_msg:
		counter = counter +1
	return counter

Now we need to change the code to add some "if statements", so that it only counts 
the vows.
To test whether a char is a vow, you can use this expression:
if c == "A" or c == "E" or c == "I" or c == "O" or c == "U":

You should increment the counter only if the above statement is true.
REMEMBER indentation is significant in Python.