Pangram Checker: Determine if a Sentence Contains All Letters

A pangram is a sentence that includes every letter of the English alphabet at least once. In this problem, your task is to check if the given sentence is a pangram.

You need to ignore case and any non-alphabetical characters. If the sentence contains every letter from a to z, output YES; otherwise, output NO.

Example:

• Input: the quick brown fox jumps over the lazy dog
  Output: YES

inputFormat

The input is a single string read from standard input (stdin). This string may include spaces, punctuation, and mixed case letters.

outputFormat

Output a single line to standard output (stdout): YES if the string is a pangram, or NO if it is not.

the quick brown fox jumps over the lazy dog

YES