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"""

Check Pangram

Checks whether a given string is a pangram, meaning it contains every

letter of the English alphabet at least once.

Reference: https://en.wikipedia.org/wiki/Pangram

Complexity:

Time: O(n) where n is the length of the input string

Space: O(1)

"""

from __future__ import annotations

def check_pangram(input_string: str) -> bool:

"""Check if the input string is a pangram.

Args:

input_string: The string to check.

Returns:

True if the string contains every letter of the alphabet, False otherwise.

Examples:

>>> check_pangram("The quick brown fox jumps over the lazy dog")

True

"""

alphabet = "abcdefghijklmnopqrstuvwxyz"

return all(char in input_string.lower() for char in alphabet)