import java.io.IOException;
import java.io.FileDescriptor;
import java.io.LineNumberReader;
import java.io.FileReader;
import java.io.FileWriter;


public class Type {
	public static void main(String[] args) {
		FileReader fr = null;
		FileWriter fw = null;
		LineNumberReader lnr = null;
		String line;

		try {
			fr = new FileReader(args[0]);
			lnr = new LineNumberReader (fr);
			fw = new FileWriter(FileDescriptor.out);

			while ( (line = lnr.readLine()) != null) {
				fw.write( lnr.getLineNumber()+": "+line+"\n" );
			}//while
		} catch (IOException ioe) {
			System.out.println("an IOException occurred");
			System.out.println( ioe.getMessage() );
		} finally {
			try {
				fr.close();
				fw.close();
			} catch (IOException ioe) {
				//ignore it
			} //catch
		} //finally
	} //main()
} //class Type