Problem

Write a recursive function called filter$\_$stringthat takes a string as a parameter. Return a string that filters out characters that are consonants.

Hint

Expected Output

If you test your function with the following code:

# test code below if $\_\_$name$\_\_=="\_\_$main$\_\_"$: example$\_$word $=$ 'muSic' print$($filter$\_$string$($example$\_$word$))$

It should produce the output:

ui

What doesif $\_\_$name$\_\_=="\_\_$main$\_\_"$:mean?

If you test your function with the following code:

# test code below if $\_\_$name$\_\_=="\_\_$main$\_\_"$: example$\_$word $=$ 'HippOpatAmus' print$($filter$\_$string$($example$\_$word$))$

It should produce the output:

iOaAu

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