from string import ascii_lowercase as lowercase
def check_pangram(text):
    return set(lowercase).issubset(set(text.lower()))

if __name__ == '__main__':
    # These "asserts" using only for self-checking and not necessary for auto-testing
    assert check_pangram("The quick brown fox jumps over the lazy dog."), "brown fox"
    assert not check_pangram("ABCDEF"), "ABC"
    assert check_pangram("Bored? Craving a pub quiz fix? Why, just come to the Royal Oak!"), "Bored?"

    print("All done? Earn rewards by using the 'Check' button!")
