import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.EOFException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringReader;
public class MainClass {
public static void main(String[] args) throws IOException {
try {
BufferedReader in4 = new BufferedReader(new StringReader("asdf"));
PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter("IODemo.out")));
int lineCount = 1;
String s = null;
while((s = in4.readLine()) != null )
out1.println(lineCount++ + ": " + s);
out1.close();
} catch(EOFException e) {
System.err.println("End of stream");
}
}
}