import java.io.*;

class Extract 
{
    publicstaticvoid main(String args[]) 
    {
        String s,str,substr;
        int extract,start,len,check;

        try{
            BufferedReader obj = new BufferedReader(new InputStreamReader

(System.in));
            System.out.print("Enter String : ");
            System.out.flush();
            str=obj.readLine();
            len=str.length();

            System.out.print("Enter Starting position to extract characters  : ");
            System.out.flush();
            s=obj.readLine();
            start=Integer.parseInt(s);
            start=start-1;
            if(start<0 || start>len)
            {
                 System.out.println("INVALID POSITION");
                 System.exit(1);
            }

            System.out.print("Enter how many characters you want to extract 

: ");
            System.out.flush();
            s=obj.readLine();
            extract=Integer.parseInt(s);
            check=extract+start;
            if(check<0 || check>len )
            {
                 System.out.println("TRYING TO EXTRACT INVALID POSITION");
                 System.exit(1);
            }
        
           substr=str.substring(start,check);
           System.out.println("\nEXTRACTED STRING IS "+substr);
         }
    catch(Exception e) {}


    }
}