namespace Problem_06.Extract_Sentences
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    internal class Program
    {
        private const string Alphabet = "abcdefghijklmnopqrstuvwxyz";
        private static void Main(string[] args)
        {

            var separators = new[] { '.', '?', '!' };
            var keyWord = Console.ReadLine();
            var text = Console.ReadLine();
            var sentences = text.Split(separators).ToList();

            var containingSentences = new List<string>();
            var set = new HashSet<char>(Alphabet + Alphabet.ToUpper());
            sentences.ForEach(
                sentence =>
                    {
                        var original = sentence;
                        var nonLetterCharacters = sentence.ToCharArray().Where(character => !set.Contains(character)).Distinct().ToList();
                        nonLetterCharacters.ForEach(character=>sentence = sentence.Replace(character, ' '));
                        var words = sentence.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                        if (words.Any(word => word.Equals(keyWord)))
                        {
                            containingSentences.Add(original.Trim());
                        }
                    });

           /* var nonLetterChars = "[^A-Za-z]";
            containingSentences.AddRange(from sentence in sentences let words = Regex.Split(sentence, nonLetterChars) where words.Any(x => x == keyWord) select sentence.Trim());*/
            Console.WriteLine(string.Join(Environment.NewLine, containingSentences));
        }
    }
}