import java.util.regex.*;

public class Groups{

static public final String POEM =

"Twas brilling, and the slithy toves\n" +

"Did gyre an gimble in the wabe.]n" +

"All mimsy were the borogoves,\n" +

"And the mome raths outgrabe.\n\n" +

"Beware the Jabberwock, my som,\n" +

"The jaws that bite, the claws that catch.\n" +

"Beware the Jubjub bird, and shun\n" +

"The firumious Bandesnatch.";

public static void main(String[] args){

Matcher m = Pattern.compile("(?m)(\\S+)\\s+((\\S+)\\s+(\\S+))$").matcher(POEM);

while(m.find()){

for(int j=0;j<=m.groupCount();j++){

System.out.print("[" + m.group(j) + "]");

}

System.out.println();

}

}

}