/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String hora = "8 hrs 2 mins";
		int firstSpace = hora.indexOf(" ");
 
		String temp = replaceCharAt(hora, firstSpace, "");
 
		int lastSpace = temp.lastIndexOf(" ");
		String horaSemEspacos = replaceCharAt(temp, lastSpace, "");
 
		System.out.println(horaSemEspacos);
	}
 
	public static String replaceCharAt(String s, int pos, String c) {
    	return s.substring(0, pos) + c + s.substring(pos + 1);
    }
}

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