using System;

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char[] vowels = new char[] {'a','e','i','o','u'};

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Console.WriteLine(vowels [^1]);

Console.WriteLine(vowels [^2]);

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Index first = 0;

Index last = ^1;

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Console.WriteLine(vowels [first]);

Console.WriteLine(vowels [last]);

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char[] firstTwo =  vowels [..2];

char[] lastThree = vowels [2..];

char[] middleOne = vowels [2..3];

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Console.WriteLine(firstTwo);

Console.WriteLine(lastThree);

Console.WriteLine(middleOne);