/* 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[]) {
    String input = "I am test";
    String result = "";
    for (int i = input.length() - 1; i >= 0; i--) {
        Character c = input.charAt(i);
        if (c != ' ') {
            result = c + result;
        } else {
            System.out.print(result + " ");
            result="";
        }
    }
    System.out.println(result);
}
}

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