import java.util.*;
 
class prog {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        // Citim textul emailului
        StringBuilder emailTextBuilder = new StringBuilder();
        while (scanner.hasNextLine()) {
            String line = scanner.nextLine();
            if (line.isEmpty()) {
                break; // Oprim citirea dacă întâlnim o linie goală
            }
            emailTextBuilder.append(line).append(" ");
        }
        String emailText = emailTextBuilder.toString();
 
        // Divizăm textul în cuvinte și numărăm aparițiile fiecărui cuvânt
        Map<String, Integer> wordCount = new HashMap<>();
        String[] words = emailText.split("\\s+");
        for (String word : words) {
            wordCount.put(word, wordCount.getOrDefault(word, 0) + 1);
        }
 
        // Găsim cuvântul cu cele mai multe apariții
        String mostFrequentWord = "";
        int maxCount = 0;
        for (Map.Entry<String, Integer> entry : wordCount.entrySet()) {
            String word = entry.getKey();
            int count = entry.getValue();
            if (count > maxCount || (count == maxCount && word.compareTo(mostFrequentWord) < 0)) {
                mostFrequentWord = word;
                maxCount = count;
            }
        }
 
        // Afișăm rezultatul
        System.out.println(mostFrequentWord);
 
        scanner.close();
    }
}
 

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VGhpcyBpcyAgc2ltcGxlIGVtYWlsIHdpdGggYSByZXBlYXRlZCB3b3JkIHdvcmQuCg==

This is  simple email with a repeated word word.