import java.io.*;
import java.util.*;

public class Program_16_2 {
	public static void main(String [] args) throws Exception {
		Scanner scanner = new Scanner(new File("document.text"));

		while (scanner.hasNextLine()) {
			String line = scanner.nextLine().trim();

			int i = 0;
			while (i < line.length()) {
				char c = line.charAt(i);
				while (i < line.length() && !(c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z')) {
					i++;
					if (i < line.length()) c = line.charAt(i);
				}

				String word = "";
				while (i < line.length() && (c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z')) {
					word += line.charAt(i);
					i++;
					if (i < line.length()) c = line.charAt(i);
				}

				System.out.println(word);
			}
			System.out.println();
		}
	}
}