The function counts the number of vowels (a, e, i, o, u, A, E, I, O, U) in the input string and returns the count as a word.

[CODE]:
```python
def count_vowels(input_string):
    vowels = "aeiouAEIOU"
    count = sum(1 for char in input_string if char in vowels)
    count_words = {
        0: "zero",
        1: "one",
        2: "two",
        3: "three",
        4: "four",
        5: "five",
        # Add more if necessary
    }
    return count_words[count]

input_strings = ["aAbBcC", "A1B2C3", "123abc", "AAAaaa", "1a2b3c"]
for input_string in input_strings:
    print(input_string, count_vowels(input_string))
```

Let's test with a few more inputs to confirm the behavior.

COMMAND: PYTHON(./temp/function.py "hi" "Bye" "cAp" "vowel" "IgLoO")