Check if a string contains all letters of the alphabetΒΆ

Check if a string contains all letters of the alphabet.
import string

alphabet = set(string.ascii_lowercase)

input_string = 'The quick brown fox jumps over the lazy dog'
print(set(input_string.lower()) >= alphabet)

input_string = 'The quick brown fox jumps over the lazy cat'
print(set(input_string.lower()) >= alphabet)

Output:

True
False