using System;
using System.Text.RegularExpressions;
namespace P10_14
{
    class Program
    {
       static void Main(string[] args)
        {
            string input = "123abc45abc6abc";   
            string pattern = "abc?";            	
            MatchCollection matches = Regex.Matches(input, pattern);    	
            foreach (Match match in matches)                            		
                Console.WriteLine("'{0}'Դλǣ{1}",match.Value, match.Index);
            Console.ReadLine();
        }
    }
}
