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 import java.io.DataInputStream;
 import java.io.FileInputStream;
 import java.io.IOException;
 
 public class Main {
 public static void main(String[] args) throws IOException {
 DataInputStream in = new DataInputStream(new FileInputStream("Main.class"));
 
 int start = in.readInt();
 if (start != 0xcafebabe) {
 System.out.println("not valid");
 }
 in.close();
 System.out.println(in.readUnsignedShort()+"/"+in.readUnsignedShort());
 
 }
 }
 
 
 
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