This function takes a string as input and returns the count of vowels (a, e, i, o, u) in the input string as a word (e.g. "one", "two", "three").

[CODE]:
```python
def count_vowels(input_string):
    vowels = "aeiou"
    count = 0
    for char in input_string.lower():
        if char in vowels:
            count += 1
            
    number_words = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
    return number_words[count]

input_strings = ["hello", "world", "test", "function", "example"]
for s in input_strings:
    print(count_vowels(s))
```