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27 lines
434 B
C#
27 lines
434 B
C#
using System;
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namespace _520A
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{
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class Program
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{
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static string c = "abcdefghijklmnopqrstuvwxyz";
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static bool Check(string s)
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{
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for (int i = 0; i < 26; i++)
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{
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if (s.IndexOf(c[i]) == -1)
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{
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return false;
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}
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}
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return true;
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}
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static void Main(string[] args)
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{
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string s = Console.ReadLine();
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s = Console.ReadLine().ToLower();
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Console.WriteLine("{0}", Check(s) ? "YES" : "NO");
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}
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}
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}
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