import java.security.*;
import java.io.FilePermission;
class Lubaja3 extends SecurityManager{
  public void checkPermission(Permission p){
    System.out.println(p);
    if(p instanceof FilePermission){
      if(!p.getName().toLowerCase().startsWith("t")){
        throw new SecurityException("Lugemiseks lubatud vaid t-ga algavad failinimed");
      }
    }
  }
}