import itertools


def is_pangram(sentence):
    sentence = str(sentence)
    final_set = set(c.lower() for c in sentence if c.isalpha())
    return len(final_set) == 26

b97851a715aea71fe57d1db57a94baf37a0c954d
<mask token>

<mask token>


def is_pangram(sentence):
    sentence = str(sentence)
    final_set = set(c.lower() for c in sentence if c.isalpha())
    return len(final_set) == 26

import itertools


def is_pangram(sentence):
    sentence = str(sentence)
    final_set = set(c.lower() for c in sentence if c.isalpha())
    return len(final_set) == 26
