Pangram

Easy
30.8% Acceptance

Your task is to figure out if a sentence is a pangram.

A pangram is a sentence using every letter of the alphabet at least once.
It is case insensitive, so it doesn't matter if a letter is lower-case (e.g. k) or upper-case (e.g. K).

For this exercise we only use the basic letters used in the English alphabet: a to z.