import java.io.*;
class InOutSim{
    public static void main(String args[]) {
String msg;    
char a = 'S';
char b = 'T';
char c = 'O';
char d = 'P';
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       System.out.println(" Для завершения 'stop'. ");
       try{
       do{
           msg = br.readLine();
           if(msg.compareTo("stop") != 0){
       System.out.println(msg);} else break;
       }while(msg.compareTo("stop") != 0);
       } catch(IOException exc){System.out.println(exc);}
       PrintWriter pw = new PrintWriter(System.out, true);
       pw.print(a);
       pw.print(b);
       pw.print(c);
       pw.println(d);
       
       System.out.println("args length = " + args.length);  

       if(args.length != 2) System.out.println(" 2 file. ");
       char ch;
       try{BufferedReader brr = new BufferedReader(new FileReader(args[0]));
       FileWriter fw = new FileWriter(args[1]);
       do{
       ch=(char)brr.read();
       
       System.out.println("ch = " + ch);
       if(ch !=(char) -1) {System.out.println("ch === " + ch); fw.write(ch);} // вот тут она должна записать в файл считанное, но она этого не делает.
       else break;
       
       }while(ch !=(char) -1);
       }
       catch(IOException exc){System.out.println(exc);}
       
      
    }
}