String[] days_Week = {"Sunday", "Monday", "Tuesday", "Wednesday",
      "Thursday", "Friday", "Saturday"};
   
    int[] name_Letters = {6,6,7,9,8,6,8};
    int num_Letter = 0;
    String input = "";
    final int MIN = 6;
    final int MAX_COUNT = 9;
    final int exit = -1;
    boolean numCorrect = false;

    do
    {
      System.out.println ("Please enter a number from " + MIN +" to " + MAX_COUNT+".");
      System.out.println ("Enter "+exit+" to end.");
      input = br.readLine();
      num_Letter = Integer.parseInt (input);
     
      if (num_Letter > exit)
      {
        // This loop checks if the input is in the array
        for (int count = 0; count < MAX_COUNT; count++)
        {
          if (num_Letter == name_Letters[count])
          {
            System.out.println (days_Week[count]);
            numCorrect = true;
          }
        }
        if (!numCorrect)
        {
          System.out.println ("Error, input is not a correct number");
          System.out.println ("Please try again.");
          System.out.println (" ");
          numCorrect = false;
        }
      }
    }
    while (num_Letter > exit);
  }
}

import java.io.*;
class arrayPrac4
{
  public static void main (String args [])
    throws java.io.IOException
  {
    BufferedReader br = new BufferedReader (new InputStreamReader (System.in));