Write a Python program to count the number of vowels and consonants in a string entered by the user.

string = input("Enter a string: ")

vowels = 0
consonants = 0

for ch in string:
    if ch.isalpha():  # Check if the character is an alphabet
        if ch.lower() in "aeiou":
            vowels += 1
        else:
            consonants += 1

print("Number of Vowels:", vowels)
print("Number of Consonants:", consonants)