def count_vowels_consonants(text="How many vowels and consonants are in this sentence?"):
    vowels = {'a', 'e', 'i', 'o', 'u'}
    vowels_count = 0
    consonants_count = 0

    for char in text.lower():  # Handle case insensitivity
        if char in vowels:
            vowels_count += 1
        elif char.isalpha():  # Check for alphabetic characters
            consonants_count += 1

    return vowels_count, consonants_count

# Function call and result display
vowels_count, consonants_count = count_vowels_consonants()

print(f"The number of vowels in the string is: {vowels_count}")
print(f"The number of consonants in the string is: {consonants_count}")