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import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.ParameterizedType;
import java.nio.charset.Charset;
import java.nio.file.DirectoryStream;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.ArrayList;