Check if the Sentence Is Pangram

Easy

Problem

A pangram is a sentence where every letter of the English alphabet appears at least once.

Given a string sentence containing only lowercase English letters, return true if sentence is a pangram, or false otherwise.

Input: sentence = "thequickbrownfoxjumpsoverthelazydog"

Output: true

sentence contains at least one of every letter of the English alphabet.

Input: sentence = "leetcode"

Output: false

The sentence only contains 5 unique letters: c, d, e, l, o, t. It's missing 21 letters.

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