package dup;


import java.util.StringTokenizer;

public class Dup {
   public static void main(String a[]){
       String str = "my     name     is      khan";
      // char []aar=str.toCharArray();

       StringTokenizer st = new StringTokenizer(str, " ");
       StringBuffer sb = new StringBuffer();
       while(st.hasMoreElements()){
           sb.append(st.nextElement()).append(" ");
       }
       System.out.println(sb.toString().trim());
   }
}