import java.io.*;

class TestIn
	{
	public static void main(String args[]) 
  	{
		DataInputStream data_in = new DataInputStream(System.in);
		int system_available=0;
		int char_in;

		for(;;)
			{
			try {	system_available = System.in.available(); }
			catch ( IOException e)
				{ System.out.println("System.in.available() error: " + e + ": exiting");
					return; }
	
			if ( system_available != 0 )
				{
				System.out.print(" system_avail ");
				System.out.print( system_available );
				System.out.println();

				try {	char_in = data_in.read(); }
				catch ( IOException e ) 
					{ System.out.println("data_in.read error:" + e + ": exiting");
				return; }

				System.out.println("Read:" + char_in);
				}
			}
		}
	}