import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
 
public class Main {
  public static void main(String[] args) throws Exception {
 
    String[] data = ("Now, this is a story all about how\n" +
    "My life got flipped-turned upside down\n" +
        "And I'd like to take a minute\n" +
        "Just sit right there\n" +
        "I'll tell you how I became the prince of a town called Bel Air").replaceAll("[,.\r\n]", " ").split(" +");
 
    Map<Integer, String> collect = Stream.of(data)
    	.collect(Collectors.toMap(String::length, Function.identity(), (s1, s2) -> s1 + "," + s2));
    System.out.println(collect);
  }
}
 

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