import java.io.*;
class soln10mon 
{
	public static void main(String[] args) throws Exception
	{
        bubblesort b=new bubblesort();
		b.sort();
           	 
	}


	void sort() throws Exception
	{

       File f1=new File("FileA.TXT");
	   File f2=new File("FileB.TXT");
       boolean change=true;
	 	 
		 int alternate=0;

      while(change)
		{
		  alternate=(alternate+1)%2;
		  change=false;
        // intialization of File io
		 FileInputStream fis=new FileInputStream(f1); // result of previous iteration
		 FileWriter fw=new FileWriter(f2);// result for next iteration 
		 StreamTokenizer st=new StreamTokenizer(fis);
		 st.nextToken();
		 int current=(int)st.nval,next=0;
     
       while(st.nextToken()!=st.TT_EOF)
		{
              next=(int)st.nval;

		   if(next<current)  // Bypass or SWAP step
			{
				change=true;  // => there is next iteration
                fw.write(""+next+" ");
				System.out.println(" writing");
			}
			else{// Change the current
							System.out.println(" writing");
                 fw.write(""+current+" ");
				 current=next;
			}
		}

        fw.write(""+current+" "); // write last element

        fw.flush();
		fw.close();
		 
        // change the File references for each alternation
        if(alternate==1) {
			               f1=new File("FileB.TXT");
                           f2=new File("FileA.TXT");
		}
		else {
               f1=new File("FileA.TXT");
               f2=new File("FileB.TXT");
        }   

	  }// outer while

	    if(alternate==1) { f2.renameTo(f1);} // if result is in FileB then copy it back to FileA
	}
        
   

};