Task04Main.java

package com.example.task04;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.sql.SQLOutput;
import java.util.Comparator;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Task04Main {

    public static void main(String[] args) {

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        reader.lines()
                .map(String::toLowerCase)
                .flatMap(line -> Stream.of(line.split("[^\\p{L}\\p{N}]+")))
                .filter(word -> !word.isEmpty())
                .collect(Collectors.groupingBy(word -> word, Collectors.counting()))
                .entrySet()
                .stream()
                .sorted(Map.Entry.comparingByKey())
                .sorted(Map.Entry.comparingByValue(Comparator.reverseOrder()))
                .limit(10)
                .map(Map.Entry::getKey)
                .forEach(word -> System.out.print(word + "\n"));

    }

}