View Code of Problem 43

import java.util.Scanner;

public class Main{

	public static void main(String args[]){
		
		Scanner scan=new Scanner(System.in);
			
		while(scan.hasNext()){
		   
		     String s=scan.nextLine();   
		     StringBuffer s1=new StringBuffer(s);
	             for(int i=0;i<s1.length();i++){
			if((s1.charAt(i)>='a'&&s1.charAt(i)<='z')||(s1.charAt(i)>='A'&&s1.charAt(i)<='Z')){
			}else{
			     s1.delete(i,i+1);
			     i=i-1;    
			}
		     }
		
		   
		   System.out.println(s1);
	        }
	        
	}

}