using System;
using System.Linq;
public class Test
{
public static void Main()
{
string str = "The quick brown fox jumps over the lazy dog";
string[] words = str.Split();
string res = String.Join(" ", words.Select((w, i) => i == 0 ? w : words[i-1].Last() + w).ToArray());
Console.Write(res);
}
}
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