AnonumousVox

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace _03Problem_AnonumousVox
{
    class Program
    {
        static void Main(string[] args)
        {
            string placeholderBlocks = Console.ReadLine();
            string[] values = Console.ReadLine().Split(new char[]{'{', '}'},StringSplitOptions.RemoveEmptyEntries).ToArray();

            string pattern = @"(?<startEnd>[A-Z-a-z]+)(?<placeholder>.+)(\k<startEnd>)";
            MatchCollection matchedPlaceholders = Regex.Matches(placeholderBlocks, pattern);

            int index = 0;

            foreach (Match matched in matchedPlaceholders)
            {
                string oldPlaceholder = matched.Groups["placeholder"].Value;
                string newPlaceholder = values[index];

                placeholderBlocks = placeholderBlocks.Replace(oldPlaceholder, newPlaceholder);
                index++;
            }

            Console.WriteLine(placeholderBlocks);
        }
    }
}