The function counts the number of vowels (A, E, I, O, and U) in the input string and returns the count as an English word. For example, if there are two vowels in the input string, the function returns "two".

[CODE]:
``` python
def count_vowels(input_string):
    input_string = input_string.lower()
    vowels = "aeiou"
    count = sum(1 for char in input_string if char in vowels)
    num_to_word = {0: "zero", 1: "one", 2: "two", 3: "three", 4: "four", 5: "five"}
    return num_to_word[count]

input_strings = ["hello", "world", "test", "sample", "input"]
for s in input_strings:
    print(f"({s}, {count_vowels(s)})")
```
