// Start 4:47 pm

// Finish 5:24 (total of 37 minutes)

using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static string GetName(string line) 

    {

        string result = "";

        List<string> names = new List<string>( new string[] {"Bobby", "Rod", "Stewart", "Andrew", "Lucy"} );

        List<string> phrases = new List<string>( new string[] {"I'm", "My name is", "im", "I am"} );

​

        // Find the intro phrase and advance to the first word after the phrase

        int pos = -1;

        foreach (string phrase in phrases) {            

            pos = line.IndexOf(phrase, StringComparison.CurrentCultureIgnoreCase);

            if (pos >= 0) {

                pos += phrase.Length;

                break;

            }

        }

        // Get out if nothing is found

        if (pos < 0) return "";

​

        // Find names that go right after the intro phrase

        string[] words = line.Substring(pos).Trim().Split(new char[] { ' ', ',', '.' });

        foreach (string word in words) {

            if (!names.Contains(word, StringComparer.OrdinalIgnoreCase))

                break;

            result += word + " ";

        }

        return result.Trim();

    }

​

    public static void Main()

    {

        string[] lines = { "Hi, I'm Bobby", "My name is Rod Stewart", "Nice to meet you, im Andrew...", 

                            "I am Lucy it's nice to meet you", "im stewart, how are you doing?", "There's no name here", "Hi I'm nobody",

                            "I am an idiot", "I'm Lucy Stewart and I like cars.", "Where is Lucy and her dog?", "I am hungry but I want to see Lucy first." };

        foreach (string s in lines) {

            Console.WriteLine(string.Format("{0} => {1}", s, GetName(s)));

        }

    }

}