import javax.imageio.*;
import java.awt.image.*;
import java.awt.*;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.util.regex.*;
import java.util.List;
import java.util.zip.*;
import java.util.*;

public class main {
  public static void main(String[] args) throws Exception {
    String dirToList = ".";
    File d = new File(dirToList);
    if (d.isDirectory()) {
      for (File f : d.listFiles()) {
        boolean isDir = f.isDirectory();
        String line = (isDir ? "D" : "F") + " " + f.getName();
        if (!isDir) {
          long size = f.length();
          String suffix = "B";
          if (size >= 1024*1024) {
            size = (size+1024*1024-1) / (1024*1024);
            suffix = "MB";
          } else if (size >= 1024) {
            size = (size+1024-1) / 1024;
            suffix = "KB";
          }
          line += " (" + size + " " + suffix + ")";
        }
        print(line);
      }
    }
  }

static void print() {
  System.out.println();
}

static void print(Object o) {
  System.out.println(o);
}

static void print(long i) {
  System.out.println(i);
}
}