using System;
using System.Collections.Generic;
 
public class Test
{
	public static void Main()
	{
		string input = "all our vidphone lines here are trapped. they recirculate the call to other offices within the building";
 
        var queryList = new List<string> { "other", "they", "all", "building" };
 
        string[] stack = input.Split(' ');
 
        foreach (var word in queryList)
        {
            for (int i = 0; i < stack.Length; i++)
            {
                if (word != stack[i]) continue;
 
                Console.WriteLine($"Found: {word}");
                Console.WriteLine(i > 0 ? $"Left: {stack[i-1]}" : "Left: (NONE)");
                Console.WriteLine(i < stack.Length - 1 ? $"Right: {stack[i+1]}" : "Right: (NONE)");
                Console.WriteLine();
            }
        }
 
        Console.ReadLine();
	}
}

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