import java.io.*;

class OnlyExt implements FilenameFilter{
	String ext;

	public OnlyExt(String ext){
		this.ext="." + ext;
	}
	
	public boolean accept(File dir,String name){
		return name.endsWith(ext);
	}
}

public class FilterFiles{
	public static void main(String args[]) throws IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		System.out.println("Please enter the directory name : ");
		String dir = in.readLine();
		System.out.println("Please enter file type : ");
		String extn = in.readLine();
		File f = new File(dir);
		FilenameFilter ff = new OnlyExt(extn);
		String s[] = f.list(ff);

		for (int i = 0; i < s.length; i++)
		{
			System.out.println(s[i]);
		}
	}
}