This is a continuation of my LINQ stories from Pangrams-Hackerrank. Similarly, this challenge has been asked before in python Pangrams python Implementation but I have tried to accomplish this challenge using LINQ.

Here is a summary of the question

Roy wanted to increase his typing speed for programming contests. So, his friend advised him to type the sentence "The quick brown fox jumps over the lazy dog" repeatedly, because it is a pangram. (Pangrams are sentences constructed by using every letter of the alphabet at least once.)

After typing the sentence several times, Roy became bored with it. So he started to look for other pangrams.

Given a sentence , tell Roy if it is a pangram or not.

Input Format

Input consists of a string .

Constraints

Length of can be at most 10³(1≤|s|≤10³) and it may contain spaces, lower case and upper case letters. Lower-case and upper-case instances of a letter are considered the same.

Output Format

Output a line containing pangram if is a pangram, otherwise output not pangram.

Sample Input

Input #1

We promptly judged antique ivory buckles for the next prize    

Input #2

We promptly judged antique ivory buckles for the prize 

Sample Output

Output #1

pangram

Output #2

not pangram

Explanation

In the first test case, the answer is pangram because the sentence contains all the letters of the English alphabet.

Here is my implementation

using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.IO;
class Solution {
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        
            string pangramInput = Console.ReadLine();
            var alphabet = Enumerable.Range(97, 26).Select((x) => (char)x);
            var pangramCheck = pangramInput.Replace(" ", "").ToLower().OrderBy((letter) => letter).Distinct().SequenceEqual(alphabet);
            string answer = pangramCheck ? "pangram" : "not pangram";
            Console.WriteLine(answer);
    }
}

Thoughts

I know this is a simple exercise and can be achieved without LINQ but the main idea is to know how to use LINQ functions.

• Is the use of LINQ right? are there other simpler alternatives?