VALIDUSERNAME

	import java.util.ArrayList;
		import java.util.Scanner;
		import java.util.regex.Matcher;
		import java.util.regex.Pattern;

		public class ValidUsernames {
		    public static void main(String[] args) {
		        Scanner scanner = new Scanner(System.in);

		        String[] input = scanner.nextLine().split("[\\s()\\\\/]+");
		        Pattern pattern = Pattern.compile("^[a-zA-Z][\\w]{2,25}+$");

		        ArrayList<String> validUsernames = new ArrayList<>();
		        for (int i = 0; i < input.length; i++) {
		            if (pattern.matcher(input[i]).find()){
		                validUsernames.add(input[i]);
		            }
		        }

		        int index = 0;
		        int bestLength = 0;
		        for (int i = 0; i < validUsernames.size() - 1; i++) {
		            int currentLength = validUsernames.get(i).length() + validUsernames.get(i + 1).length();
		            if (currentLength > bestLength){
		                index = i;
		                bestLength = currentLength;
		            }
		        }

		        System.out.printf("%s\n%s", validUsernames.get(index), validUsernames.get(index + 1));
		    }
		    {
	}

}